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Laboratory 16. The Foot
Step 6. Third Layer of Muscles of the Sole of the Foot

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Cut the tendon of flexor digitorum longus muscle distal to the attachment of the quadratus plantae muscle and reflect the tendon distally, together with the lumbrical muscles. Also retract the tendon of the flexor hallucis longus muscle from the base of first metatarsal [probe]. These procedures reveal the muscles of the third layer (Figure 16.6).

  • The flexor hallucis brevis muscle covers the first metatarsal bone and is comprised of two heads, the medial head of the flexor hallucis brevis muscle and the lateral head of the flexor hallucis brevis muscle. Each head of the muscle has a tendon attached to a sesamoid bone.

Links and References:
Grant's: 5.112
Netter (1ed.): 503 (2ed.): 499
Rohen/Yokochi: 439, 470, and 471