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94A Kinesiology Practice Exam

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Which muscle is NOT part of the hip adductor group listed?
Correct Answer:
Biceps femoris
Explanation:
The key idea is which muscles bring the thigh toward the midline. The hip adductor group consists of muscles in the medial thigh that mainly adduct the hip: gracilis, pectineus, and adductor magnus. Gracilis is a long, thin muscle running down the inner thigh, contributing to thigh adduction (and also aiding knee flexion). Pectineus sits higher in the medial thigh and helps with hip flexion and adduction. Adductor magnus is a large muscle with an adductor part that strongly pulls the thigh inward. Biceps femoris, by contrast, belongs to the posterior compartment (the hamstrings). Its primary actions are hip extension and knee flexion, not adduction. That’s why it’s not considered part of the hip adductor group.

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