Muscles of Sole of Foot (2nd Layer)

Question 0

lumbricals

Answer 0

O: tendons of flexor digitorum longus
I: medial aspect of expansion over lateral 4 digits
N: medial 1– medial plantar nerve S2, S3
lateral 3– lateral plantar nerve S2, S3
A: flex prox phalanges
extend middle and distal phalanx of lat 4 digits

Question 1

quadratus plantae

Answer 1

O: medial surface of lateral margin of plantar surface of calcaneus
I: posterolateral margin of tendon of flexor digitorum longus
N: lateral plantar nerve S2, S3
A: assists flexor digitorum longus in flexing lateral 4 digits