Which muscle is NOT a primary hip adductor?

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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 primary hip adductor?

Explanation:
Think of which muscles mainly pull the thigh toward the midline. Adductor longus, gracilis, and adductor magnus are classic primary hip adductors; their primary job is to bring the thigh inward, with some additional actions (like flexion or extension) depending on their fibers and position. Pectineus, while it can assist with adduction, is best described as a hip flexor and sits in the anterior thigh. Its strongest action is hip flexion, so adduction isn’t its dominant role. That makes pectineus not a primary hip adductor, which is why it’s the correct choice.

Think of which muscles mainly pull the thigh toward the midline. Adductor longus, gracilis, and adductor magnus are classic primary hip adductors; their primary job is to bring the thigh inward, with some additional actions (like flexion or extension) depending on their fibers and position. Pectineus, while it can assist with adduction, is best described as a hip flexor and sits in the anterior thigh. Its strongest action is hip flexion, so adduction isn’t its dominant role. That makes pectineus not a primary hip adductor, which is why it’s the correct choice.

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