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Questions and Answers
What is the action of the sartorius muscle?
Which muscle is a sesamoid bone embedded within its tendon?
What is the origin of the rectus femoris muscle?
Which nerve innervates the hamstring muscles?
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Which muscle group is responsible for extending the knee joint?
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What is the nerve supply for the gracilis muscle?
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Which of the following muscles is NOT a flexor of the hip?
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The nerve that supplies the muscles of the anterior compartment of the thigh is the:
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Which of the following muscles is an adductor of the hip joint?
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Which of the following structures divides the thigh into three compartments?
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The femoral triangle is a region located in the:
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Which muscle is responsible for adduction of the hip joint as well as flexion of the knee joint?
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Which nerve supplies the Gracilis muscle?
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What is the origin of the Adductor magnus (Adductor portion)?
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Which muscle inserts into the posterior border of the femur at the Linea Aspera?
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In the femoral triangle, what structures are enclosed in a fascial envelope known as the Femoral sheath?
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What is the function of the Adductor canal (Subsartorial canal)?
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Study Notes
Anterior Compartment of Thigh
- Extensors of knee: Quadriceps femoris
- Flexors of hip:
- Sartorius
- Pectineus
- Psoas major
- Iliacus
- Nerve supply: Femoral nerve (L2,3,4)
Muscles of Anterior Compartment
Sartorius
- Origin: Anterior superior iliac spine
- Insertion: Upper part of medial surface of tibia
- Action:
- Flexion, abduction, and lateral rotation of hip joint
- Flexion of knee joint
Pectineus
- Origin: Superior pubic ramus
- Insertion: Back of femur (below lesser trochanter)
- Action: Flexion and adduction of hip joint
Iliopsoas
- Origin:
- Iliacus: Inner surface of iliac fossa and anterior sacroiliac ligament
- Psoas major: Anterior surfaces of T12-L4 vertebrae and discs
- Insertion: Lesser trochanter of femur
- Action: Flexion of hip joint
Quadriceps Femoris
- Origin:
- Rectus femoris: Anterior inferior iliac spine (Hip bone)
- Vastus intermedius: Front of shaft of femur (Ant. & Lat.)
- Vastus medialis: Posterior border of femur (upper end and shaft of femur)
- Vastus lateralis: Posterior border of femur (upper end and shaft of femur)
- Insertion:
- Into Patella (Patella is a sesamoid bone)
- From patella into Tuberosity of tibia through Ligamentum patellae (Patellar ligament)
- Action: Extension of knee joint
Medial Compartment of Thigh
- Muscles:
- Adductor longus
- Adductor brevis
- Adductor magnus (Adductor part)
- Gracilis
- Action: Adduction of hip joint
- Nerve supply: Obturator nerve
Adductor Magnus
- Adductor part:
- Origin:
- Body of pubis
- Inferior pubic ramus
- Ischial ramus
- Insertion: Posterior border of femur (Linea Aspera)
Femoral Triangle and Adductor Canal
Femoral Triangle
- Site: Upper 1/3 of front of thigh
- Boundaries:
- Base: Inguinal ligament
- Lateral: Medial border of sartorius
- Medial: Medial border of adductor longus
- Roof: Skin and superficial and deep fasciae
- Floor:
- Adductor longus
- Pectineus
- Psoas major
- Iliacus
- Contents:
- Femoral vein
- Femoral artery
- Femoral nerve
- Deep inguinal lymph nodes
Adductor Canal (Subsartorial Canal)
- Definition: Intermuscular passage for femoral artery and vein to become the popliteal vessels in the popliteal fossa at the back of the knee.
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Description
Learn about the muscles of the anterior and medial compartments of the thigh including their origin, insertion, nerve supply, and actions. Test your knowledge on naming and describing these muscles with this quiz.
