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Intrinsic muscles of the foot (Plantar foot (third (flexor hallucis brevis…
Intrinsic muscles of the foot
Dorsum of foot
Extensor digitorum brevis
to tendon of EDL
only 4 medial toes
from superolateral calcaneus
Extention at MTP
deep fibular nerve
dorsum of foot
extensor hallucis to base of proximal phalax
Plantar foot
second
quadratus plantae
2 heads origin: M & L process of calcan. tuberosity
to: lateral side of flexor digitorum longus
helps longus in toe 2-5 flexion
Lumbricals
origin: tendon of FDL
to: extensor hood
flex MTP & extend IP
related to flexor digitorum longus
analogus to flexor digitorum profundus
third
flexor hallucis brevis
2 origin: M from T of tibialis post and L from cuboid
2 insert: to base of proximal phalanx
inf to flex hallucis longus
flex toe at MTP
related to 2 seasmoid
adductor hallucis
transverse: deep transverse MT ligament to base of toe p phalanx
oblique: base of metatarsal 3-4 & tendon of fibularis longus to base of p phalanx of > toe
adduct > toe at MTP
related to small & big toes
flexor digiti minimi
from base of 5th metatarsal & T of fibularis longus (in groove of cuboid)
to 5th proximal phalanx
flex little toe
first layer
abductor hallucis
to: medial base of great toe
flexion and abducts toe
from: medial calcaneus M
Abductor digiti minimi
base of proximal phalanx (small)
abducts little toe at MTP
calcaneus M & L tuberosity
flexor digitorum brevis
to middle phalanx of lateral 4 digit
slit tendon
from: calcaneal tuberosity M
analogus to flexor digitorum superficialis
toe flexion ar PIP
middle of 3
fourth
dorsal interossei
bipennate
abductors of toes 2-4
4
from lateral metatarsal 2-4 and medial meta tarsal of 2
2nd toe abducted on 2 planes
palmar interossei
to: base of proximal phalanges + EE
origin: metatarsal 3-5 medial
3
unipenate, 1 side of Meta tarsal
PAD & DAB
Plantar inf to dorsal
innervation
deep fibular
extensor digitorum brevis (1st)
1st and 2nd dorsal interossei (4th)
posterior tibial
medial
1st layer
abductor hallucis
flexor digitorum brevis
2nd (1st lumbrical)
3rd
flexor hallucis brevis
lateral
1st
abductor digiti minimi
2nd
quadratus plantae
2-4 lumbricals
all 3rd, except FHB
all 4th
fine movement of toes