Podcast
Questions and Answers
The primary muscle responsible for abduction of the arm is the ______.
The primary muscle responsible for abduction of the arm is the ______.
supraspinatus
The middle fibers of the ______ assist in the abduction of the arm.
The middle fibers of the ______ assist in the abduction of the arm.
deltoid
Adduction of the arm is performed by the pectoralis major, lats, and ______.
Adduction of the arm is performed by the pectoralis major, lats, and ______.
teres major
For internal rotation of the arm, the ______ is a key muscle involved.
For internal rotation of the arm, the ______ is a key muscle involved.
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The scapula is rotated by the trapezius and the ______.
The scapula is rotated by the trapezius and the ______.
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The action of the Pronator Teres muscle is ______ of the forearm.
The action of the Pronator Teres muscle is ______ of the forearm.
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The Flexor Carpi Ulnaris originates from the ______ epicondyle of the humerus.
The Flexor Carpi Ulnaris originates from the ______ epicondyle of the humerus.
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The Biceps Brachii muscle flexes the arm at the ______ and shoulder.
The Biceps Brachii muscle flexes the arm at the ______ and shoulder.
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The Extensor Digitorium muscle extends the ______ and digits.
The Extensor Digitorium muscle extends the ______ and digits.
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The primary action of the Triceps Brachii is ______ of the arm at the elbow.
The primary action of the Triceps Brachii is ______ of the arm at the elbow.
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The origin of the Supraspinatus muscle is the Supraspinous fossa of the ______.
The origin of the Supraspinatus muscle is the Supraspinous fossa of the ______.
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The Flexor Digiti Minimi Brevis flexes the metacarpophalangeal joint of the ______ finger.
The Flexor Digiti Minimi Brevis flexes the metacarpophalangeal joint of the ______ finger.
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The Gluteus Maximus is responsible for ______ and lateral rotation of the hip.
The Gluteus Maximus is responsible for ______ and lateral rotation of the hip.
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The action of the Tensor Fasciae Latae includes flexion, abduction, and ______ rotation of the hip.
The action of the Tensor Fasciae Latae includes flexion, abduction, and ______ rotation of the hip.
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The Adductor Magnus is involved in the ______ and flexion of the hip joint.
The Adductor Magnus is involved in the ______ and flexion of the hip joint.
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The action of the Extensor Pollicis Longus is to extend the ______.
The action of the Extensor Pollicis Longus is to extend the ______.
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The Abductor Pollicis Longus assists in the ______ of the thumb.
The Abductor Pollicis Longus assists in the ______ of the thumb.
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The Rhomboid Major muscle retracts and rotates the ______.
The Rhomboid Major muscle retracts and rotates the ______.
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The origin of the Flexor Pollicis Longus is the ______ of the radius.
The origin of the Flexor Pollicis Longus is the ______ of the radius.
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The Lumbricals assist with flexion at the MCP joint and ______ at the IP joints.
The Lumbricals assist with flexion at the MCP joint and ______ at the IP joints.
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The ______ joint allows for flexion and extension of the elbow.
The ______ joint allows for flexion and extension of the elbow.
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In the knee joint, the ______ stabilizes the joint along with the menisci.
In the knee joint, the ______ stabilizes the joint along with the menisci.
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The ______ is responsible for the lateral rotation of the hip joint.
The ______ is responsible for the lateral rotation of the hip joint.
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The proximal radioulnar joint is a type of ______ joint.
The proximal radioulnar joint is a type of ______ joint.
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In the wrist joint, flexion is assisted by the ______ and flexor carpi radialis.
In the wrist joint, flexion is assisted by the ______ and flexor carpi radialis.
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The ______ joint allows for opposition of the thumb.
The ______ joint allows for opposition of the thumb.
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The ankle joint is classified as a ______ joint, allowing for dorsiflexion and plantarflexion.
The ankle joint is classified as a ______ joint, allowing for dorsiflexion and plantarflexion.
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The ______ joint between vertebrae provides cushioning and stability.
The ______ joint between vertebrae provides cushioning and stability.
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During supination of the forearm, the ______ muscle assists in the motion.
During supination of the forearm, the ______ muscle assists in the motion.
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Gluteal muscles are primarily responsible for ______ of the hip joint.
Gluteal muscles are primarily responsible for ______ of the hip joint.
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The medial collateral ligament is vital for providing stability to the ______ joint.
The medial collateral ligament is vital for providing stability to the ______ joint.
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Hip flexion is mainly controlled by the ______.
Hip flexion is mainly controlled by the ______.
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The ______ joint allows for circumduction of the shoulder.
The ______ joint allows for circumduction of the shoulder.
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In the distal radioulnar joint, ______ facilitates pronation and supination.
In the distal radioulnar joint, ______ facilitates pronation and supination.
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Flexion in the digits is primarily achieved by the ______ and flexor digitorum profundas.
Flexion in the digits is primarily achieved by the ______ and flexor digitorum profundas.
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Study Notes
Muscles of the Forearm
- Pronator Teres: Responsible for pronation of the forearm and flexion of the elbow, innervated by the median nerve.
- Flexor Carpi Ulnaris: Flexes and adducts the wrist, innervated by the median nerve.
- Palmaris Longus: Flexes the wrist joint, innervated by the median nerve.
- Flexor Carpi Radialis: Flexes and abducts the hand at the wrist joint, innervated by the ulnar nerve.
- Flexor Digitorium Superficialis: Flexes the digits at the proximal interphalangeal joints, innervated by the median nerve.
- Flexor Digitorium Profundus: Flexes the distal phalanges of the digits at the distal interphalangeal joints, innervated by both the median and ulnar nerves.
- Flexor Pollicis Longus: Flexes the thumb at the interphalangeal joint, innervated by the median nerve.
- Pronator Quadratus: Pronates the forearm, innervated by the median nerve.
- Brachioradialis: Flexes the elbow, innervated by the radial nerve.
- Extensor Carpi Radialis Longus: Extends and abducts the hand at the wrist joint, innervated by the radial nerve.
- Extensor Carpi Radialis Brevis: Extends and abducts the hand at the wrist joint, innervated by the radial nerve.
- Extensor Digitorium: Extends the wrist and digits, innervated by the radial nerve.
- Extensor Digiti Minimi: Extends the pinky finger, innervated by the radial nerve.
- Extensor Carpi Ulnaris: Extends and adducts the hand at the wrist joint, innervated by the radial nerve.
- Anconeus: Abducts the ulna during pronation of the forearm, innervated by the radial nerve.
- Supinator: Supinates the forearm, innervated by the radial nerve.
- Abductor Pollicis Longus: Abducts the thumb, innervated by the radial nerve.
- Extensor Pollicis Longus & Brevis: Extend the thumb, innervated by the radial nerve.
- Extensor Indicis: Extends the index finger at the interphalangeal and metacarpophalangeal joints, innervated by the radial nerve.
Muscles of the Upper Arm, Chest, and Shoulder
- Biceps Brachii: Responsible for supination of the forearm and flexing the arm at both the elbow and shoulder, innervated by the musculocutaneous nerve.
- Coracobrachialis: Flexes the arm at the shoulder, innervated by the musculocutaneous nerve.
- Brachialis: Responsible for flexion at the elbow, innervated by the musculocutaneous nerve with contribution from the radial nerve.
- Triceps Brachii: Extends the arm at the elbow, innervated by the radial nerve.
- Trapezius: Elevates, rotates, and retracts the scapula, innervated by the accessory nerve.
- Lattissimus Dorsi: Extends, adducts, and medially rotates the upper limb, innervated by the thoracodorsal nerve.
- Levator Scapulae: Elevates the scapula, innervated by the dorsal scapular nerve.
- Rhomboid Major: Retracts and rotates the scapula, innervated by the dorsal scapular nerve.
- Rhomboid Minor: Retracts and rotates the scapula, innervated by the dorsal scapular nerve.
- Deltoid: Antagonizes the motion of the rotator cuff, involved in flexion, medial rotation, extension, lateral rotation, and abduction of the upper limb, innervated by the axillary nerve.
- Teres Major: Adducts and extends the arm, involved in medial rotation of the arm at the shoulder, innervated by the lower subscapular nerve.
- Supraspinatus: Abducts the upper limb at the shoulder, innervated by the suprascapular nerve.
- Infraspinatus: Laterally rotates the arm, innervated by the suprascapular nerve.
- Subscapularis: Medially rotates the arm, innervated by the upper and lower subscapular nerve.
- Teres Minor: Laterally rotates the arm, innervated by the axillary nerve.
- Pectoralis Major: Adducts and medially rotates the upper limb, draws the scapula anteroinferiorly, innervated by the lateral and medial pectoral nerves.
- Pectoralis Minor: Stabilizes the scapula, innervated by the medial pectoral nerve.
- Serratus Anterior: Rotates and protracts the scapula, innervated by the long thoracic nerve.
- Subclavius: Anchors and depresses the clavicle, innervated by the subclavian nerve.
Muscles of the Hand
- Opponens Pollicis: Opposes the thumb, medially rotating and flexing the metacarpal on the trapezium.
- Abductor Pollicis Brevis: Abducts the thumb.
- Flexor Pollicis Brevis: Flexes the metacarpophalangeal joint of the thumb.
- Opponens Digiti Minimi: Rotates the metacarpal of the pinky finger.
- Abductor Digiti Minimi: Abducts the little finger.
- Flexor Digiti Minimi Brevis: Flexes the metacarpophalangeal joint of the little finger.
- Lumbricals: Assist in digit flexion and extension.
- Dorsal Interossei: Abduct digits and assists with flexion at the MCP joint and extension at the IP joints.
- Palmar Interossei: Adduct digits and assist with flexion at the MCP joint and extension at the IP joints.
- Palmaris Brevis: Wrinkles the skin of the hypothenar eminence, improves grip.
- Adductor Pollicis: Adducts the thumb.
Muscles of the Hip
- Gluteus Medius: Abducts and medially rotates the hip joint, innervated by the superior gluteal nerve.
- Gluteus Minimus: Abducts and medially rotates the hip, innervated by the superior gluteal nerve.
- Tensor Fasciae Latae: Flexes, abducts, and medially rotates the hip, innervated by the superior gluteal nerve.
- Gluteus Maximus: Extends and laterally rotates the hip, innervated by the inferior gluteal nerve.
- Biceps Femoris (Long Head): Flexes the knee and extends the hip, innervated by the tibial nerve.
- Biceps Femoris (Short Head): Flexes the knee, innervated by the common fibular nerve.
- Semitendinosus: Flexes the knee and extends the hip, innervated by the tibial nerve.
- Semimembranosus: Flexes the knee and extends the hip, innervated by the tibial nerve.
- Adductor Magnus, Hammies & Adductor Parts: Responsible for adduction and flexion of the hip joint. The adductor magnus is innervated by the tibial nerve, the other adductor muscles are innervated by the obturator nerve.
- Sartorius: Flexes and abducts the hip, laterally rotates the hip, flexes the knee, innervated by the femoral nerve.
- Rectus Femoris: Extends the knee and flexes the hip, innervated by the femoral nerve.
- Iliacus: Flexes the hip, innervated by the femoral nerve.
- Psoas Major: Flexes the hip, innervated by the anterior rami of the lumbar nerves.
- Iliopsoas Tendon: Flexes the hip, innervated by the femoral nerve and the anterior rami of the lumbar nerves.
- Gracilis: Adducts the hip and flexes the knee, innervated by the obturator nerve.
- Adductor Longus: Adducts and flexes the hip, innervated by the obturator nerve.
- Adductor Brevis: Adducts and flexes the hip, innervated by the obturator nerve.
- Pectineous: Adducts and flexes the hip, innervated by the femoral nerve.
Muscles of the Knee & Ankle
- Popliteus: Flexes the knee, medially rotates the tibia, innervated by the tibial nerve.
- Vastus Medialis: Extends the knee, innervated by the femoral nerve.
- Vastus Intermedius: Extends the knee, innervated by the femoral nerve.
- Vastus Lateralis: Extends the knee, innervated by the femoral nerve.
- Gastrocnemius: Plantar flexes the ankle and flexes the knee, innervated by the tibial nerve.
- Soleus: Plantarflexes the ankle, innervated by the tibial nerve.
- Plantaris: Weakly plantar flexes the ankle and assists in flexion of the knee, innervated by the tibial nerve.
- Tibialis Posterior: Plantar flexes and inverts the ankle, innervated by the tibial nerve.
- Flexor Digitorum Longus: Flexes the toes and plantar flexes the ankle, innervated by the tibial nerve.
- Flexor Hallucis Longus: Flexes the big toe and plantar flexes the ankle, innervated by the tibial nerve.
- Tibialis Anterior: Dorsiflexes and inverts the ankle, innervated by the deep fibular nerve.
- Peronus Tertius: Dorsiflexes and everts the ankle, innervated by the deep fibular nerve.
- Extensor Digitorum Longus: Dorsiflexes and extends the toes.
- Extensor Hallucis Longus: Dorsiflexes and extends the big toe.
- Peroneus Longus: Everts and plantarflexes the ankle, innervated by the superficial fibular nerve.
- Peroneus Brevis: Everts and plantar flexes the ankle, innervated by the superficial fibular nerve.
Muscles of Mastication & Facial Muscles
- Masseter: Elevates and retracts the mandible, innervated by the trigeminal nerve (CN V3).
- Temporalis: Elevates and retracts the mandible, innervated by the trigeminal nerve (CN V3).
- Lateral Pterygoid: Protracts and depresses the mandible, innervated by the trigeminal nerve (CN V3).
- Medial Pterygoid: Elevates and protracts the mandible, innervated by the trigeminal nerve (CN V3).
- Frontalis: Raises eyebrows and wrinkles forehead, innervated by the facial nerve (CN VII).
- Orbicularis Oculi: Closes eyelids, innervated by the facial nerve (CN VII).
- Zygomaticus Major: Elevates the corners of the mouth.
- Zygomaticus Minor: Elevates the upper lip.
- Depressor Anguli Oris: Depresses the corners of the mouth.
- Levator Labii Superioris: Elevates the upper lip.
- Orbicularis Oris: Closes and protrudes the lips.
Muscles of the Back and Abdomen
-
Erector Spinae: Extends and laterally flexes the spine, innervated by the dorsal rami of the spinal nerves.
- Spinalis: Extends and laterally flexes the spine.
- Longissimus: Extends and laterally flexes the spine.
- Iliocostalis: Extends and laterally flexes the spine.
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Transversospinalis: Extends and rotates the spine, innervated by the dorsal rami of the spinal nerves.
- Semispinalis: Extends and rotates the spine.
- Multifidus: Stabilizes the spine, extends and rotates the spine.
- Rotatores: Stabilizes the spine, extends and rotates the spine.
- Rectus Abdominis: Flexes the trunk and compresses abdominal contents, innervated by the lower thoracic nerves (T7-T11).
- External Oblique: Flexes and rotates the trunk, compresses abdominal contents, innervated by the lower thoracic nerves and subcostal nerves.
- Internal Oblique: Flexes and rotates the trunk, compresses abdominal contents, innervated by the lower thoracic nerves.
- Transverse Abdominis: Compresses abdominal contents, innervated by the lower thoracic nerves.
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Description
Test your knowledge on the muscles involved in arm movement and other related functions. This quiz covers the primary actions of key muscles and their anatomical origin. Perfect for students studying human anatomy or related health sciences.
