Fourth Layer Muscles of Sole of Foot

Question 0

Dorsal Interossei

Answer 0

Origin: Adjacent sides of metatarsals 1-5

Insertion: (first) medial side of proximal phalanx of 2nd digit; (second through fourth) lateral sides of 2nd-4th digits

Innervation: Lateral plantar nerve (S2, S3)

Question 1

Plantar Interossei (three muscles)

Answer 1

Origin: Bases and medial sides of metatarsals 3-5

Insertion: Medial sides of bases of proximal phalanges of 3rd-5th digits

Innervation: Lateral plantar nerve (S2, S3)