💀anatomy and physiology i review

Flexor digitorum superficialis

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

The flexor digitorum superficialis is a muscle in the forearm that flexes the fingers at the proximal interphalangeal joints. It acts primarily on the middle phalanges of the four fingers excluding the thumb.