Musculus flexor hallucis brevis is a Latin term that refers to a specific muscle in the human body. Synonyms or alternative terms for this muscle include the short flexor muscle of the big toe or the FHB muscle. This muscle plays a vital role in the movement of the big toe, enabling flexion and assisting with locomotion. Located on the plantar surface of the foot, it is responsible for bending the big toe downwards. Understanding these synonyms can aid in discussions about anatomy, physiology, and medical conditions related to this important muscle.