Fibularis longus

Definition

The fibularis longus is a muscle located on the lateral side of the lower leg, primarily involved in plantar flexion and eversion of the foot. It originates from the upper part of the fibula and inserts into the base of the first metatarsal bone and medial cuneiform.

Related terms

Plantar Flexion: The movement that decreases the angle between the sole of the foot and the back of the leg, similar to pressing down on a gas pedal.

Eversion:

A movement of the sole of the foot away from the midline of the body, enabling it to adapt to various terrains.

Lateral Malleolus: The bony prominence on each side of the ankle, where muscles such as fibularis longus attach for leverage and stability during movement