fourth layer of the foot

origin of platar interossei

base and metatarsals 3,4,5

insertion of plantar interossei

medial aspect of the base of the proximal phalanx of digits 3,4,5

action of plantar interossei

adduct digits 3,4,5

assist in flexion the metatarsal phalangeal joints of digits 3,4,5

innervation of plantar interossei

medial 2 - deep lateral plantar nerve S2,S3

lateral most - superficial lateral plantar nerve S2,S3

origin of dorsal interossei

adjacent sides of metatarsals 1-5

insertion of dorsal interossei

medial most 1- medial side of the proximal phalanx of digit 2

the rest - lateral sides of digits 2,3,4

action of dorsal interossei

abduct digits 2,3,4

flexion of the metatarsal phalangeal joints

innervation of dorsal interossei

medial 3- deep lateral plantar nerve S2,S3

lateral most - superficial lateral plantar nerve S2,S3