What is Flexor Digitorum Brevis?
Flexor Digitorum Brevis Muscle: Anatomy, Function, and Clinical Relevance Introduction The Flexor Digitorum Brevis (FDB) is a small but vital muscle located in the sole of the foot. It plays a crucial role in maintaining proper toe flexion, providing support to the arches of the foot, and facilitating smooth movements during walking, running, and balancing. Despite being overshadowed by larger muscles in the lower limb, the FDB is often implicated in conditions involving foot fatigue, plantar fasciitis, and biomechanical imbalances. Anatomy Origin The muscle originates from the medial process of the calcaneal tuberosity and the plantar aponeurosis . Insertion The FDB splits into four tendons , each of which inserts into the middle phalanges of the 2nd to 5th toes (digits 2–5). These tendons pass superficially over the flexor digitorum longus tendons. Nerve Supply Innervated by the medial plantar nerve , a branch of the tibial nerve . Spinal roots : S1–S2 Bl...