Аяқ бұлшық еті: Fibularis brevis туралы мәліметтер

Shorter and smaller of the fibularis (peroneus) muscles

In human anatomy, the fibularis brevis (or peroneus brevis) is a muscle that lies underneath the fibularis longus within the lateral compartment of the leg. It acts to tilt the sole of the foot away from the midline of the body (eversion) and to extend the foot downward away from the body at the ankle (plantar flexion).

The fibularis brevis arises from the lower two thirds of the lateral, or outward, surface of the fibula (inward in relation to the fibularis longus) and from the connective tissue between it and the muscles on the front and back of the leg. The muscle passes downward and ends in a tendon that runs behind the lateral malleolus of the ankle in a groove that it shares with the tendon of the fibularis longus; the groove is converted into a canal by the superior fibular retinaculum, and the tendons in it are contained in a common mucous sheath. The tendon then runs forward along the lateral side of the calcaneus, above the calcaneal tubercle and the tendon of the fibularis longus. It inserts into the tuberosity at the base of the fifth metatarsal on its lateral side. The fibularis brevis is supplied by the superficial fibular (peroneal) nerve.

The fibularis brevis is the strongest abductor of the foot. Together with the fibularis longus and the tibialis posterior, it extends the foot downward away from the body at the ankle (plantar flexion). It opposes the tibialis anterior and the fibularis tertius, which pull the foot upward toward the body (dorsiflexion). The fibularis longus also tilts the sole of the foot away from the midline of the body (eversion). The word "peroneus" comes from the Greek word "perone," meaning pin of a brooch or a buckle. In medical terminology, the word refers to being of or relating to the fibula or to the outer portion of the leg.