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Questions and Answers
Through which structure does the obturator artery leave the pelvis?
Where does the obturator artery arise from?
Which muscles are supplied by the anterior division of the obturator nerve?
Where does the posterior division of the obturator nerve pass in relation to the adductor brevis muscle?
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Which muscle receives supply from the posterior division of the obturator nerve?
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Where do the anterior and posterior branches of the obturator artery anastomose together?
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Which muscle of the medial compartment of the thigh has its origin from the superior pubic ramus?
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What is the nerve supply for the Adductor longus muscle in the medial compartment of the thigh?
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Which muscle of the medial compartment of the thigh forms a thick muscular septum?
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What is the action of the Adductor brevis muscle in the medial compartment of the thigh?
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Which muscle in the medial compartment of the thigh has its origin from both the ischial and pubic rami?
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What is the action of the Pectineus muscle in the medial compartment of the thigh?
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Which muscle originates from the ischial tuberosity and has an ischial part and a hamstring part?
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Which muscle serves as a guide to reach the adductor tubercle due to its insertion by a round tendon?
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Which muscle is responsible for extending the hip?
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Which muscle inserts into the upper part of the medial surface of the tibia?
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Which muscle is innervated by the obturator nerve's anterior division and functions to adduct the thigh and flex the knee?
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Which muscle rotates the thigh laterally and originates from the anterior aspect of the obturator membrane and margin of obturator foramen?
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Study Notes
Muscles of Medial Compartment of the Thigh
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Pectineus muscle: originates from the superior pubic ramus, inserts into the upper end of the linea aspera, supplied by the femoral nerve, and performs adduction and flexion of the thigh.
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Adductor longus muscle: originates from the body of the pubis, inserts into the linea aspera, supplied by the obturator nerve (anterior division), and performs adduction and medial rotation of the thigh.
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Adductor brevis muscle: originates from the inferior pubic ramus, inserts into the linea aspera, supplied by the obturator nerve, and performs adduction and medial rotation of the thigh.
Adductor Magnus Muscle
- Formed of two parts: pubic part and ischial part
- Pubic part: originates from the ischial ramus and adjacent inferior pubic ramus, inserts into the medial lip of the gluteal tuberosity, linea aspera, and medial supracondylar line, supplied by the posterior division of the obturator nerve, and performs adduction of the thigh
- Ischial part: originates from the ischial tuberosity, inserts into the adductor tubercle, supplied by the sciatic nerve, and performs extension of the hip
Adductor Hiatus
- Located in the adductor magnus muscle
- Contains 4-5 oseo-aponeurotic openings close to its insertion into the linea aspera
- The most caudal opening is the largest, called the adductor hiatus, which transmits the terminal femoral artery and vein to the popliteal fossa
Other Muscles
- Gracilis muscle: originates from the body of the pubis, inserts into the upper part of the medial surface of the tibia, supplied by the obturator nerve (anterior division), and performs adduction of the thigh and flexion of the knee
- Obturator externus muscle: originates from the anterior aspect of the obturator membrane and margin of obturator foramen, inserts into the trochanteric fossa, supplied by the posterior division of the obturator nerve, and performs lateral rotation of the thigh
Arterial and Nerve Supply
- Obturator artery: arises from the internal iliac artery, descends on the wall of the lesser pelvis with the obturator nerve, leaves the pelvis through the obturator canal, and divides into anterior and posterior branches
- Obturator nerve: arises from the lumbar plexus, passes along the side of the lesser pelvis, leaves the pelvis through the obturator canal, and divides into anterior and posterior divisions
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Description
Learn about the muscles in the medial compartment of the thigh, including their names, anatomy details like origin, insertion, nerve supply, actions, and the anatomy of the adductor hiatus. Explore the nerve and arterial supply specific to the medial compartment of the thigh.
