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Muscles / Lower legs

Flexor digitorum brevis

Also called FDB.

Anatomy

Origin
Medial process of the calcaneal tuberosity, plantar aponeurosis, intermuscular septa
Insertion
Both sides of the middle phalanges of toes 2-5
Nerve
Medial plantar nerve (S2-S3)

Actions

  • Flexes toes 2-5 at the PIP joints
  • Supports the longitudinal arch

Also trained by

References (5)
  1. McKeon PO, Hertel J, Bramble D, Davis I. Br J Sports Med. 2015;49(5):290. The foot core system: a new paradigm for understanding intrinsic foot muscle function
  2. Standring S, ed. Elsevier. Gray's Anatomy: The Anatomical Basis of Clinical Practice. 42nd ed.
  3. Dalley AF, Agur AMR. Wolters Kluwer. Moore's Clinically Oriented Anatomy. 9th ed.
  4. Neumann DA. Elsevier. Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation. 3rd ed.
  5. Betts JG, Young KA, Wise JA, et al. OpenStax (free, openly licensed textbook). Anatomy and Physiology 2e