Ankle and Foot Anatomy Quiz

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Questions and Answers

How many tarsal bones are present in the foot?

  • 14
  • 12
  • 5
  • 7 (correct)

Which of the following bones is NOT classified as a tarsal bone?

  • Metacarpal (correct)
  • Calcaneus
  • Cuneiform
  • Cuboid

What type of joint is the ankle joint classified as?

  • Fibrous joint
  • Hinge joint (correct)
  • Ball and socket joint
  • Pivot joint

Which bones articulate at the ankle joint?

<p>Talus, tibia, and fibula (A)</p> Signup and view all the answers

How many total phalanges are found in the foot?

<p>14 (C)</p> Signup and view all the answers

What type of fracture requires both internal and/or external fixation?

<p>Pilon fracture (C)</p> Signup and view all the answers

Which joint allows for gliding and rotation, facilitating inversion movement?

<p>Subtalar joint (C)</p> Signup and view all the answers

What describes the action of dorsiflexion at the ankle?

<p>Moving the top of the foot towards the leg (C)</p> Signup and view all the answers

Which muscles are primarily responsible for the inversion of the foot?

<p>Tibialis anterior and posterior (B)</p> Signup and view all the answers

What forms the longitudinal and transverse arches of the foot?

<p>Bones of the foot (D)</p> Signup and view all the answers

Which structures provide support to the arches of the foot?

<p>Supporting ligaments and tendons (C)</p> Signup and view all the answers

What is the primary function of the extensor retinacula?

<p>Overly the anterior compartment tendons (B)</p> Signup and view all the answers

Which injury is commonly associated with the lateral collateral ligament of the ankle?

<p>Strain of the lateral collateral ligament (C)</p> Signup and view all the answers

Which movement does eversion primarily involve?

<p>Turning the sole of the foot outward (B)</p> Signup and view all the answers

What is a significant component of the neurovascular structure in the sole of the foot?

<p>Nerves and blood vessels (D)</p> Signup and view all the answers

What are the primary functions of the arches of the foot?

<p>To absorb and distribute downward forces during standing and moving (D)</p> Signup and view all the answers

Which bones are involved in the medial part of the longitudinal arch?

<p>Calcaneus, talus, navicular, the 3 cuneiforms, and first 3 metatarsals (C)</p> Signup and view all the answers

What structure primarily maintains the arches of the foot?

<p>Ligaments and muscles (A)</p> Signup and view all the answers

What is the function of the plantar aponeurosis?

<p>To provide firm attachment to the skin and protect the neurovascular bundle (A)</p> Signup and view all the answers

Which ligaments are associated with the medial and lateral parts of the longitudinal arch?

<p>Long plantar ligament and plantar calcaneonavicular ligament (B)</p> Signup and view all the answers

Which of the following nerves provides sensation to the sole of the foot?

<p>Lateral and medial plantar nerves (D)</p> Signup and view all the answers

How many layers of muscles are organized in the sole of the foot?

<p>Four layers (A)</p> Signup and view all the answers

What is the role of deep fascia in the sole of the foot?

<p>To thicken and form the plantar aponeurosis (D)</p> Signup and view all the answers

What does the Medial Plantar Nerve provide cutaneous sensation to?

<p>Medial three and one-half toes (B)</p> Signup and view all the answers

Which artery is larger and passes deep to muscles in the sole of the foot?

<p>Lateral Plantar Artery (C)</p> Signup and view all the answers

What structure do the medial and lateral plantar veins accompany?

<p>Digital arteries to the toes (A)</p> Signup and view all the answers

What does the Lateral Plantar Nerve primarily supply?

<p>Lateral one and one-half toes (D)</p> Signup and view all the answers

What is located midway between the anterior superior iliac spine and the pubic symphysis?

<p>Midinguinal point (A)</p> Signup and view all the answers

Which artery forms the deep plantar arch?

<p>Lateral Plantar Artery (A)</p> Signup and view all the answers

Which nerves provide motor branches to muscles in the sole of the foot?

<p>Medial and Lateral Plantar Nerves (D)</p> Signup and view all the answers

What joins with the Lateral Plantar Artery at the first intermetatarsal space?

<p>Dorsalis Pedis Artery (C)</p> Signup and view all the answers

Where is the small saphenous vein positioned in relation to the lateral malleolus?

<p>Posterior to the lateral malleolus (C)</p> Signup and view all the answers

Which vein drains directly into the femoral vein?

<p>Great saphenous vein (B)</p> Signup and view all the answers

What happens to the popliteal vein as it passes into the adductor hiatus?

<p>It becomes the femoral vein (A)</p> Signup and view all the answers

Which nerve is a branch of the common fibular nerve?

<p>Superficial fibular nerve (B)</p> Signup and view all the answers

Which structure is found on the medial side of the dorsal venous arch?

<p>Great saphenous vein (C)</p> Signup and view all the answers

What characterizes the deep veins of the lower limb?

<p>They accompany arteries (A)</p> Signup and view all the answers

What is the fate of the femoral vein when it passes under the inguinal ligament?

<p>It becomes the external iliac vein (A)</p> Signup and view all the answers

Which nerve is specifically responsible for sensation in the back of the thigh?

<p>Posterior cutaneous nerve of the thigh (C)</p> Signup and view all the answers

What role do perforating veins play in the venous system of the lower limb?

<p>They connect superficial and deep veins (C)</p> Signup and view all the answers

Where do deep veins of the leg primarily drain?

<p>Into the popliteal vein (D)</p> Signup and view all the answers

Which tarsal bone articulates with the tibia and fibula at the ankle joint?

<p>Talus (C)</p> Signup and view all the answers

What is the primary function of the tarsal bones?

<p>To facilitate movement and structure in the foot (B)</p> Signup and view all the answers

Which of the following accurately describes the ankle joint's movement capabilities?

<p>Permits hinge-like dorsiflexion and plantarflexion (C)</p> Signup and view all the answers

Which of the following bones is NOT a part of the tarsal bones?

<p>Metatarsal 1 (A)</p> Signup and view all the answers

How many phalanges are there in the foot?

<p>14 (C)</p> Signup and view all the answers

What kind of fracture is characterized by multiple fractures of the tibia due to high axial forces?

<p>Pilon fracture (D)</p> Signup and view all the answers

Which tarsal joint is specifically responsible for allowing gliding and rotation involved in inversion?

<p>Subtalar joint (C)</p> Signup and view all the answers

What action is defined as moving the top of the foot towards the leg?

<p>Dorsiflexion (A)</p> Signup and view all the answers

Which muscles are primarily responsible for the eversion movement of the foot?

<p>Fibularis longus, brevis, and tertius (C)</p> Signup and view all the answers

What structure provides a pathway for tendons and nerves on the medial side of the ankle?

<p>Tarsal tunnel (A)</p> Signup and view all the answers

Which artery contributes primarily to the vascular supply of the sole of the foot?

<p>Medial plantar artery (C)</p> Signup and view all the answers

What imaging technique is commonly used to interpret abnormalities in the foot and ankle joint?

<p>X-ray (C)</p> Signup and view all the answers

Which veins accompany the corresponding arteries in the sole of the foot?

<p>Medial and lateral plantar veins (D)</p> Signup and view all the answers

Which aspect of the foot's vascularization forms the plantar arch?

<p>Digital arteries (B)</p> Signup and view all the answers

Which nerves are primarily responsible for providing motor branches to the muscles in the sole of the foot?

<p>Medial and lateral plantar nerves (A)</p> Signup and view all the answers

What occurs during an inversion sprain of the ankle?

<p>Stretching of the lateral ligaments (C)</p> Signup and view all the answers

What stabilizes the ankle joint?

<p>Medial and lateral ligaments (A)</p> Signup and view all the answers

Which ligament is injured first in an inversion ankle sprain?

<p>Anterior talofibular ligament (C)</p> Signup and view all the answers

What type of fracture is a bimalleolar ankle fracture also known as?

<p>Pott’s fracture (B)</p> Signup and view all the answers

Which component characterizes the lateral ligament of the ankle?

<p>Three separate ligaments (D)</p> Signup and view all the answers

What causes a Pott’s fracture during an everted foot movement?

<p>Pulling of the medial ligament on the medial malleolus (D)</p> Signup and view all the answers

What is the consequence of a severe inversion ankle sprain?

<p>Injury to the anterior and posterior talofibular ligaments (C)</p> Signup and view all the answers

Which anatomical feature of the talus contributes to joint stability when the foot is dorsiflexed?

<p>Wider anteriorly than posteriorly (B)</p> Signup and view all the answers

What is the role of the plantar aponeurosis in the foot?

<p>To assist in maintaining the arches and provide attachment to the skin (C)</p> Signup and view all the answers

Which ligament is described as a strong ligament that connects the sustentaculum tali to the inferior surface of the navicular?

<p>Plantar calcaneonavicular ligament (D)</p> Signup and view all the answers

What is included in the medial part of the longitudinal arch?

<p>Calcaneus, talus, navicular, and the 3 cuneiforms (A)</p> Signup and view all the answers

Which of the following best describes the transverse arch of the foot?

<p>Formed at the junction of tarsals with metatarsals (D)</p> Signup and view all the answers

Which nerves provide sensation to the plantar aspect of the foot?

<p>Medial plantar nerve and lateral plantar nerve (B)</p> Signup and view all the answers

What comprises the lateral part of the longitudinal arch?

<p>Calcaneus, cuboid, and lateral 2 metatarsals (B)</p> Signup and view all the answers

Which structure functions to absorb and distribute downward forces during standing and movement?

<p>Longitudinal arch (A)</p> Signup and view all the answers

What is the drainage path of the small saphenous vein?

<p>It drains into the popliteal vein. (D)</p> Signup and view all the answers

What structure accompanies the deep veins in the lower limb?

<p>Arteries. (A)</p> Signup and view all the answers

Which of the following statements about the great saphenous vein is true?

<p>It drains into the femoral vein. (D)</p> Signup and view all the answers

Where does the popliteal vein become the femoral vein?

<p>After it passes into the adductor hiatus. (C)</p> Signup and view all the answers

What characterizes the common fibular nerve?

<p>It is from the sacral plexus. (B)</p> Signup and view all the answers

Which nerve provides sensation to the lateral aspect of the calf?

<p>Superficial fibular nerve. (A)</p> Signup and view all the answers

Which of the following is true about the blood supply of the deep veins in the lower limb?

<p>They drain into the femoral vein. (D)</p> Signup and view all the answers

Which neurite structure is responsible for producing sensation in the back of the thigh?

<p>Posterior cutaneous nerve. (A)</p> Signup and view all the answers

What happens to the femoral vein when it passes underneath the inguinal ligament?

<p>It becomes the external iliac vein. (B)</p> Signup and view all the answers

Which of the following tarsal bones is primarily responsible for articulation at the ankle joint?

<p>Talus (B)</p> Signup and view all the answers

Which movement is primarily restricted by the anatomical structure of the ankle joint?

<p>Medial rotation (C)</p> Signup and view all the answers

What is the primary artery involved in the vascular supply of the sole of the foot?

<p>Posterior tibial artery (C)</p> Signup and view all the answers

Which bones make up the metatarsal structure of the foot?

<p>5 metatarsal bones (A)</p> Signup and view all the answers

Which group of bones directly articulates with the talus?

<p>Tibia and Fibula (C)</p> Signup and view all the answers

Which structure is primarily responsible for maintaining the stability of the plantar arch?

<p>Long plantar ligament (D)</p> Signup and view all the answers

In terms of structure, how are phalanges categorized in the foot?

<p>Proximal, middle, and distal for digits 2-4 (D)</p> Signup and view all the answers

Which of the following assessments is crucial for understanding peripheral pulses in the lower limb?

<p>Ankle-brachial index measurement (D)</p> Signup and view all the answers

What is the main function of the saphenous vein in the vascular system of the lower limb?

<p>Acts as a major conduit for venous return (C)</p> Signup and view all the answers

Which imaging technique is most useful for interpreting the vascular anatomy of the ankle joint?

<p>Ultrasound Doppler (D)</p> Signup and view all the answers

Which of the following structures primarily supports the arches of the foot?

<p>Plantar aponeurosis (D)</p> Signup and view all the answers

What action occurs primarily at the subtalar joint during foot inversion?

<p>Elevation of the medial arch (B)</p> Signup and view all the answers

Which neurovascular structure is located in the tarsal tunnel?

<p>Tibial nerve (B)</p> Signup and view all the answers

Which injury is specifically mentioned as occurring to the lateral collateral ligament of the ankle?

<p>Lateral ankle sprain (C)</p> Signup and view all the answers

What is the primary function of the extensor retinacula in the lower limb?

<p>Restricting excessive movement of tendons (B)</p> Signup and view all the answers

What stabilizes the ankle joint by connecting the fibula and tibia to the tarsal bones?

<p>Medial and lateral ligaments (D)</p> Signup and view all the answers

In which type of ankle sprain are the lateral ligaments most commonly affected?

<p>Inversion sprain (B)</p> Signup and view all the answers

Which ligament is typically injured first in an ankle inversion sprain?

<p>Anterior talofibular ligament (A)</p> Signup and view all the answers

What is a characteristic feature of the medial (deltoid) ligament of the ankle?

<p>It is triangular in shape and consists of four separate ligaments. (C)</p> Signup and view all the answers

Which event typically leads to a Pott's fracture?

<p>Foot being forcibly everted (C)</p> Signup and view all the answers

What is the result of overstretching the ligaments of the ankle?

<p>Ankle sprain (B)</p> Signup and view all the answers

Which ligament is not part of the lateral ligament complex of the ankle?

<p>Tibiotalar ligament (C)</p> Signup and view all the answers

What happens during the mechanical response of the ankle during dorsiflexion?

<p>The joint is more stable due to the wider anterior of the talus. (C)</p> Signup and view all the answers

What is the primary role of the plantar aponeurosis?

<p>To protect the neurovascular bundle and assist in maintaining arches (D)</p> Signup and view all the answers

Which structure is included in the lateral part of the longitudinal arch?

<p>Cuboid (B)</p> Signup and view all the answers

What component is essential for the maintenance of foot arches?

<p>Muscles and ligaments (A)</p> Signup and view all the answers

Which of the following is NOT a function of the sole of the foot?

<p>Generating heat (D)</p> Signup and view all the answers

Which component primarily acts at the junction of tarsals with metatarsals?

<p>Transverse arch (C)</p> Signup and view all the answers

Which of the following plantar ligaments connects the calcaneus to the cuboid and the bases of the 2-5 metatarsal?

<p>Long plantar ligament (D)</p> Signup and view all the answers

Which nerves provide cutaneous sensation to the lateral and medial aspects of the sole of the foot?

<p>Medial and lateral plantar nerves (C)</p> Signup and view all the answers

Which ligaments support the medial and lateral parts of the foot's longitudinal arch?

<p>Plantar calcaneonavicular ligament and long plantar ligament (C)</p> Signup and view all the answers

Which statement accurately describes the position of the small saphenous vein?

<p>It ascends in the posterior leg. (C)</p> Signup and view all the answers

What is the correct pathway of the great saphenous vein?

<p>It runs along the medial side of the leg. (C)</p> Signup and view all the answers

Which statement describes the relationship between deep veins and arteries in the lower limb?

<p>Deep veins accompany arteries as they travel through the limb. (B)</p> Signup and view all the answers

How does the popliteal vein change as it travels into the adductor hiatus?

<p>It becomes the femoral vein. (D)</p> Signup and view all the answers

Which nerve is responsible for sensation in the back of the thigh?

<p>Sural nerve. (B)</p> Signup and view all the answers

What is the fate of the femoral vein after it passes underneath the inguinal ligament?

<p>It becomes the external iliac vein. (C)</p> Signup and view all the answers

Which structure is found between the tendons of EHL and FDL?

<p>Flexor retinaculum. (D)</p> Signup and view all the answers

Which of the following nerves arise from the common fibular nerve?

<p>Superficial fibular nerve. (A)</p> Signup and view all the answers

What is the significance of perforating veins in the venous system of the lower limb?

<p>They link superficial and deep venous systems. (A)</p> Signup and view all the answers

Which statement best describes the course of the tibial nerve?

<p>It runs posteriorly in the leg and foot. (D)</p> Signup and view all the answers

Flashcards

Ankle Joint Osteology

The study of the bones that make up the ankle joint, their structure, and how they contribute to its function.

Foot Arches

The curved structures in the foot that provide support and distribute weight.

Inversion/Eversion

Foot movements; inversion is turning the sole inward, and eversion is turning the sole outward.

Peripheral Pulses

The pulse points found in the lower limb, used to assess blood flow.

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Tarsal Tunnel Anatomy

This tunnel contains the nerves and vessels running within the ankle area.

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Tarsal bones

The 7 bones that make up the rear part of the foot.

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Metatarsal bones

The 5 bones in the mid-foot that connect the tarsals and phalanges.

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Phalanges

The 14 bones that make up the toes.

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Ankle joint

A hinge-like joint that connects the foot and leg, allowing movement up and down.

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Talus

A tarsal bone that forms part of the ankle joint.

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Talus Fracture

A fracture of the talus bone, often caused by forceful impact or twisting, commonly associated with lateral malleolus (fibula) fractures.

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Pilon Fracture

A severe fracture of the distal tibia (lower part of the shinbone), involving the joint surface. Often caused by high-impact forces like falls from heights.

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Subtalar Joint

A joint between the talus and calcaneus (heel bone), allowing gliding and rotation, playing a key role in foot inversion.

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Midtarsal Joint

A combination of the talocalcaneonavicular and calcaneocuboid joints, responsible for inversion and eversion movements.

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Tarsal Tunnel Syndrome

Compression of nerves and vessels within the tarsal tunnel (space between the tarsal bones and flexor retinaculum), causing pain, numbness, and tingling.

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Transverse arch

A horizontal arch running across the foot, formed by the junction of the tarsals and metatarsals, including the cuboid and three cuneiforms.

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Longitudinal arch

A long arch running along the length of the foot, composed of two parts: the medial part (involving the calcaneus, talus, navicular, cuneiforms, and first three metatarsals) and the lateral part (involving the calcaneus, cuboid, and lateral two metatarsals).

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Plantar calcaneonavicular ligament

A strong ligament that connects the anterior sustentaculum tali to the inferior surface of the navicular bone, helping to maintain the medial longitudinal arch.

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Long plantar ligament

A strong ligament extending from the calcaneus to the cuboid and the bases of the 2nd to 5th metatarsals, contributing to the stability of the lateral longitudinal arch.

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Plantar aponeurosis

Thickened deep fascia on the sole of the foot, providing firm attachment for the skin, protecting neurovascular bundles, and assisting in maintaining the arches.

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Medial plantar nerve

One of the nerves supplying the sole of the foot, responsible for sensation in the medial side of the foot and toes.

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Lateral plantar nerve

One of the nerves supplying the sole of the foot, responsible for providing sensation to the lateral side of the foot and toes.

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Deep Plantar Arch

An arch formed by the lateral plantar artery as it passes deep to the muscles of the sole of the foot.

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Medial Plantar Artery

A smaller artery that branches from the posterior tibial artery and supplies the medial side of the big toe.

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Lateral Plantar Artery

A larger artery that branches from the posterior tibial artery, passes deep to the sole muscles, and forms the deep plantar arch.

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Posterior Tibial Artery Branches

The posterior tibial artery splits into the medial plantar artery and the lateral plantar artery, providing blood supply to the sole of the foot.

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Midinguinal Point

A landmark on the body located midway between the anterior superior iliac spine and the pubic symphysis.

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Popliteal Fossa

A hollow behind the knee joint, where the posterior tibial artery and other structures run.

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Palpable pulse b/w malleoli?

A pulsation can be felt between the medial malleolus and the heel, specifically between the tendons of the flexor digitorum longus (FDL) and flexor hallucis longus (FHL) medially, and the extensor hallucis longus (EHL) laterally.

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Small saphenous vein path?

The small saphenous vein originates on the lateral side of the dorsal venous arch, passes behind the lateral malleolus, ascends the posterior leg, and drains into the popliteal vein.

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Great saphenous vein path?

The great saphenous vein starts at the medial side of the dorsal venous arch, passes in front of the medial malleolus, travels up the medial leg, knee, and thigh, and drains into the femoral vein.

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Deep veins and arteries?

Deep veins of the lower limb usually accompany arteries. Perforating veins connect deep veins with superficial veins.

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Deep veins of the leg --> ?

Deep veins of the leg drain into the popliteal vein.

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Popliteal vein --> ?

The popliteal vein becomes the femoral vein after passing through the adductor hiatus, located in the upper thigh region.

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Femoral vein --> ?

The femoral vein becomes the external iliac vein when it passes beneath the inguinal ligament.

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Common fibular nerve origin?

The common fibular nerve originates from the sacral plexus.

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Tibial nerve origin?

The tibial nerve originates from the sciatic nerve, which itself is a branch of the sacral plexus.

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Saphenous nerve origin?

The saphenous nerve originates from the femoral nerve.

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Plantar Arch

A curved structure underneath the foot formed by arteries, supporting the weight of the body and providing blood supply to the sole of the foot. It's formed by the deep plantar artery branching from the posterior tibial artery.

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Tarsal Tunnel

A narrow space inside the ankle where nerves and blood vessels pass, formed by the tarsal bones and the flexor retinaculum. It is a potential site of compression causing pain, numbness and tingling (Tarsal Tunnel Syndrome).

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Dorsal Venous Arch

A network of veins on the top of the foot, connecting the superficial veins of the foot with the deep veins of the leg. The great and small saphenous veins both originate from this arch.

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Saphenous Veins

Superficial veins in the legs. There are two main saphenous veins: Great saphenous vein, which runs the length of the medial leg and Small saphenous vein, which runs up the posterior leg.

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Phalanges of the Foot

The fourteen bones that make up the toes, each toe has two or three phalanges.

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Talus Bone

A tarsal bone that forms part of the ankle joint and sits between the tibia and fibula.

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Lateral Malleolus Fracture

A fracture of the lateral malleolus (fibula) that occurs superior to the inferior tibiofibular joint. Often caused by forceful inversion of the foot, resulting in a twisting motion and instability of the ankle.

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Fibula - What's its function?

The fibula is a long bone in the lower leg that provides stability to the ankle joint. It helps support body weight and facilitates movement.

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Lateral Ligament - What does it do?

The lateral ligament of the ankle is composed of three separate ligaments that help stabilize the ankle joint by preventing excessive inward rolling of the foot.

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Medial Ligament - How does it work?

The medial (deltoid) ligament of the ankle is a large, strong ligament that helps stabilize the ankle joint, preventing excessive outward rolling.

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Inversion Sprain - What's the injury type?

An inversion sprain occurs when the foot rolls inward, stretching or tearing the lateral ligaments of the ankle.

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Eversion Sprain - What's the difference?

An eversion sprain is less common and occurs when the foot rolls outward, stretching or tearing the medial (deltoid) ligament.

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Pott’s Fracture - What is it?

A Pott's fracture is a bimalleolar ankle fracture, involving a break in both the medial and lateral malleolus (bones at the ankle).

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Avulsion Fracture - How is it related to ligaments?

An avulsion fracture occurs when a ligament pulls so strongly on a bone that it tears a piece of it off.

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Ankle Sprains - What's important to remember?

Ankle sprains involve stretching or tearing the ankle ligaments, ranging from mild to severe.

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Foot Arches: How many?

The foot has two main arches: the longitudinal arch (running along the length of the foot) and the transverse arch (running across the foot).

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Longitudinal Arch: Two Parts?

The longitudinal arch has two parts: the medial part, which is on the inside of the foot and includes the calcaneus, talus, navicular, cuneiforms, and 3 metatarsals. The lateral part, on the outside, involves the calcaneus, cuboid, and the last 2 metatarsals.

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Plantar Aponeurosis: Function?

The plantar aponeurosis is a thick layer of fascia on the sole of the foot. It helps maintain the arches, protects nerves and blood vessels, and provides a strong attachment for the skin.

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Plantar Ligaments: Which one is the 'spring'?

The plantar calcaneonavicular ligament, also known as the 'spring ligament', is a strong ligament that helps maintain the medial longitudinal arch. It connects the anterior sustentaculum tali to the inferior surface of the navicular bone.

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Long Plantar Ligament: Where is it?

The long plantar ligament is a strong ligament that helps stabilize the lateral longitudinal arch. It runs from the calcaneus to the cuboid and the bases of the 2nd to 5th metatarsals.

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Sole of the Foot: Innervation?

The sole of the foot's sensation is provided by the medial and lateral plantar nerves which branch off from the tibial nerve. They are responsible for the feeling in the toes and the sole of the foot.

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Foot Muscles: How many layers?

The muscles of the sole of the foot are organized into four layers, each with different functions. The arrangement helps with movement, support, and stability of the foot.

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Transverse Arch: Where do we find it?

The transverse arch forms a curved shape across the foot. It's created by the junction of the tarsals (cuboid and cuneiforms) with the metatarsals.

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Palpable Pulse Location

A pulse can be felt between the medial malleolus and the heel, specifically between the tendons of the flexor digitorum longus (FDL) and flexor hallucis longus (FHL) medially, and the extensor hallucis longus (EHL) laterally.

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Deep Veins of the Leg Drain Into?

Deep veins of the leg drain into the popliteal vein.

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Popliteal Vein Becomes?

The popliteal vein becomes the femoral vein after passing through the adductor hiatus, located in the upper thigh region.

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Femoral Vein Becomes?

The femoral vein becomes the external iliac vein when it passes beneath the inguinal ligament.

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Ankle Joint: What bones are involved?

The ankle joint is formed by the articulation of three bones: the tibia (shinbone), fibula (lower leg bone), and the talus (a tarsal bone).

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Foot Arches: What are their functions?

The foot has two main arches: the longitudinal arch (running along the length of the foot) and the transverse arch (running across the foot). These arches provide support and distribute weight, acting as shock absorbers during walking and running.

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Inversion/Eversion: What makes these movements?

Inversion is turning the sole of the foot inward, while eversion is turning the sole outward. These movements are possible due to the articulation of the subtalar joint and midtarsal joint.

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Peripheral Pulses: Where are they located?

Peripheral pulses in the lower limb are palpable at various locations where major arteries run close to the surface. These pulses can be felt by pressing gently on the skin.

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Tarsal Tunnel: What's inside?

The tarsal tunnel is a passageway in the ankle, formed by the tarsal bones and the flexor retinaculum. It houses important nerves and blood vessels that supply the foot.

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Tarsal Bones: How many?

There are seven tarsal bones in the foot, forming the rear part of the foot and contributing to its stability.

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Metatarsal Bones: Their role?

The 5 metatarsal bones are the bones in the mid-foot that connect the tarsals to the phalanges. They provide support and flexibility.

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Phalanges: What are they?

The 14 phalanges are the bones of the toes. Each toe has proximal, middle, and distal phalanges, except for the big toe which only has proximal and distal.

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Talus Bone: Function?

The talus is a tarsal bone that plays a crucial role in ankle joint formation. It sits between the tibia and fibula, enabling the ankle's up and down movements.

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Fibula Articulation

The fibula articulates with the talus, the bone in the ankle that forms the joint with the tibia. This articulation is covered by hyaline cartilage, allowing for smooth movement.

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Ankle Joint Stability

The ankle joint is more stable when the foot is dorsiflexed (pointed upwards). This is due to the wider anterior surface of the talus compared to its posterior surface.

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Ankle Ligaments: Lateral

The lateral (outer) ankle ligaments help prevent the foot from rolling inward (inversion). The anterior talofibular ligament is usually the first to be injured in an inversion sprain.

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Ankle Ligaments: Medial

The medial (inner) ankle ligament, also known as the deltoid ligament, is large and strong. It helps prevent the foot from rolling outward (eversion).

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Inversion Sprain

An inversion sprain occurs when the foot rolls inward, stretching or tearing the lateral ligaments. The anterior talofibular ligament is usually the first to be injured.

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Eversion Sprain

An eversion sprain occurs when the foot rolls outward, stretching or tearing the medial (deltoid) ligament. It's less common than inversion sprain.

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Pott's Fracture

A Pott's fracture involves a break in both the medial and lateral malleoli (bones at the ankle). It typically results from the foot being everted (rolled outward) forcefully.

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Avulsion Fracture

An avulsion fracture happens when a strong ligament pulls on a bone forcefully, causing a piece of bone to break off.

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Foot Arches: Function?

The arches of the foot provide support and distribute weight evenly, acting as shock absorbers for walking and running.

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Plantar Calcaneonavicular Ligament: What is it called?

This ligament connects the anterior sustentaculum tali to the inferior surface of the navicular bone, helping to maintain the medial longitudinal arch. It is often called the 'spring ligament' because of its role in providing springiness to the foot.

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Transverse Arch: Where is it?

This arch is formed by the junction of the tarsals (cuboid and cuneiforms) with the metatarsals, creating a curved shape across the foot.

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Study Notes

Ankle, Foot, Peripheral Pulses and Venous Drainage of the Lower Limb

  • The foot is composed of 7 tarsal bones, 5 metatarsal bones, and 14 phalanges.
  • The ankle joint is a synovial joint involving the talus of the foot and the distal ends of the tibia and fibula.
  • The ankle joint allows hinge-like dorsi- and plantarflexion.
  • The articular surface is covered by hyaline cartilage. The talus is wider anteriorly than posteriorly, which makes the joint more stable when dorsiflexed.
  • The ankle is stabilised by medial and lateral ligaments.
  • The lateral ligament is composed of three separate ligaments: anterior talofibular, calcaneofibular, and posterior talofibular ligaments.
  • The medial (deltoid) ligament of the ankle is large, strong, and triangular-shaped, composed of four separate ligaments.
  • Ankle sprains occur when ligaments are overstretched but not completely ruptured.
  • Inversion (inward) sprains primarily stretch the lateral ligaments. Eversion sprains (outward), less common, stretch the medial ligaments.
  • Pott's fracture-bimalleolar ankle fractures involve the foot forcefully everting, medial ligament pulling on the medial malleolus, and talus moving laterally, causing lateral malleolus fracture.
  • A pilon fracture is a multiple fracture of the tibia, often caused by high axial forces, potentially involving the talus or fibula, and requiring fixation.
  • Tarsal joints include the subtalar, talocalcaneonavicular, calcaneocuboid joints, and midtarsal/inter/transverse tarsal joints. Movements include inversion and eversion.
  • The tarsal tunnel is on the medial side of the ankle, between the tarsal bones and the flexor retinaculum.
  • Movements at the ankle include dorsiflexion (moving the top of the foot towards the leg), plantarflexion (moving the plantar surface of the foot away from the leg), inversion (directing the sole of the foot medially), and eversion (directing the sole of the foot laterally).
  • The arches of the foot (longitudinal and transverse) absorb and distribute downward forces during standing and movement. The medial part of the longitudinal arch involves the calcaneus, talus, navicular, cuneiforms, and first three metatarsals.
  • The lateral part of the longitudinal arch involves the calcaneus, cuboid, and lateral two metatarsals. The transverse arch is formed by the junction of the tarsals with the metatarsals, including the cuboid and cuneiforms.
  • The sole of the foot has thick skin, firmly attached to fascia, containing plantar nerves, and sweat glands. The plantar aponeurosis protects the neurovascular bundle and helps maintain arches. Planter ligaments include strong ligaments originating between the calcaneus, cuboid, and metatarsal bases, and connecting the calcaneus and navicular.
  • The sole of the foot is organized into four layers of muscles. The tibial nerve branches into medial and lateral plantar nerves, supplying motor and sensory functions to the muscles in the sole.
  • Peripheral pulses can be palpated in various locations in the lower limb, including the femoral, popliteal, posterior tibial, and dorsalis pedis pulses.
  • Superficial veins of the lower limb include the small saphenous vein (lateral side) and great saphenous vein (medial side). These veins drain into the popliteal and femoral veins, respectively.
  • Deep veins accompany arteries, connecting superficial and deep veins through perforating veins and draining into the popliteal vein, which becomes the femoral vein. The femoral vein becomes the external iliac vein when passing under the inguinal ligament.
  • The nerves related to the lower limb discussed include superficial and deep fibular, tibial nerves, saphenous nerve, and multiple branches and variations.

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