The peroneus brevis muscle, also known as the fibularis brevis muscle, is a muscle in the lateral compartment of the leg. It lies deep/medial to the adjacent peroneus longus, and is a shorter and smaller muscle.Click to see full answer. Herein, where is the peroneus brevis located?The peroneus brevis (also known as fibularis brevis, fibularis brevis muscle, peroneus brevis muscle, latin: musculus peroneus brevis) is a short muscle located in the lateral region of the lower leg just below the peroneus longus.Also Know, what causes pain in the peroneus brevis? Peroneal tendon ruptures usually happen following a traumatic event, such as an ankle sprain. As your foot inverts (turns inwards) it causes a forced stretching of the muscle. The peroneus brevis muscle can get very tight in runners, especially those who run a lot on roads. One may also ask, what does the peroneus brevis do? The peroneus brevis plays an important role in the motor functions of the foot. The muscle assists in the flexion that moves the ball of the foot away from the body. The muscle also assists with the eversion (turning outward) of the inner portion of the foot.What is a brevis muscle?22442. Anatomical terms of muscle. The adductor brevis is a muscle in the thigh situated immediately deep to the pectineus and adductor longus. It belongs to the adductor muscle group. The main function of the adductor brevis is to pull the thigh medially.