Fibularis brevis is a muscle that originates from the lower two-thirds of the lateral fibula and inserts into the tuberosity of the fifth metatarsal bone. It is responsible for plantar flexion and eversion of the foot. Some synonyms for fibularis brevis include peroneus brevis and short peroneal muscle. These terms are often used interchangeably in medical literature and anatomy textbooks. Other alternatives may include the lateral collateral ligament, lateral malleolus, and calcaneofibular ligament. Understanding these synonyms and related structures can help medical professionals better diagnose and treat any conditions related to the fibularis brevis muscle or surrounding area.