Which muscle is NOT a hamstring muscle?

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Study for the Muscle Actions and Functions – Anatomy and Movement Test. Equip yourself with multiple choice questions, each with detailed explanations and hints. Prepare confidently for your exam!

Multiple Choice

Which muscle is NOT a hamstring muscle?

Explanation:
Hamstrings are the three muscles on the back of the thigh that cross both the hip and knee joints and primarily flex the knee while assisting hip extension. The muscles that fit this group are the biceps femoris, semitendinosus, and semimembranosus. Gracilis, on the other hand, sits in the medial thigh as an adductor muscle and does not belong to the posterior hamstring group. It also has a different nerve supply (obturator nerve) and its main actions are hip adduction and knee flexion, not the characteristic posterior thigh hamstring actions. So gracilis is not a hamstring muscle.

Hamstrings are the three muscles on the back of the thigh that cross both the hip and knee joints and primarily flex the knee while assisting hip extension. The muscles that fit this group are the biceps femoris, semitendinosus, and semimembranosus. Gracilis, on the other hand, sits in the medial thigh as an adductor muscle and does not belong to the posterior hamstring group. It also has a different nerve supply (obturator nerve) and its main actions are hip adduction and knee flexion, not the characteristic posterior thigh hamstring actions. So gracilis is not a hamstring muscle.

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