94A Kinesiology Practice Exam

Where does the fibularis longus insert?

Tuberosity of the fifth metatarsal Base of the first metatarsal and medial cuneiform Calcaneus Head of the fibula

Correct Answer:

Base of the first metatarsal and medial cuneiform

Explanation:

Fibularis longus inserts on the base of the first metatarsal and the medial cuneiform on the plantar surface. This tendon travels from the fibula, around the lateral malleolus, and under the foot to reach those two bones, allowing the muscle to pull the first ray downward and medially. That placement supports the arches of the foot and enables eversion and a bit of plantarflexion. The tuberosity of the fifth metatarsal is the insertion for fibularis SAMPLEbrevis, not longus; the calcaneus is not the insertion point for this muscle, and the head of the fibula is an origin, not an insertion.

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