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Muscle layers of the Foot (2nd (Lumbricals (Innervation (1st: Medial, 2-4…
Muscle layers of the Foot
3rd
Adductor hallucis
Transverse Head and Oblique heads
Origin
Oblique:Base of 2-4 metatarsals
Transverse: Ligaments of metatarsal phalngeal joints
Insertion
proximal phalanx of 1st digit
Action
Adducts 1st digit
Innervation
lateral plantar nerve
Flexor Hallucis Brevis
Origin
Cuboid and lateral cuneiforms
Insertion
base of proximal first phalanx
Action
flexes proximal 1st digit
Innervation
Medial plantar nerve
Flexor Digiti Minimi Brevis
Origin
Base of 5th metatarsl
Insertion
base of proximal 5th phalanx
Action
Flexes proximal 5th digit
Innervation
lateral plantar nerve
2nd
Lumbricals
Insertion
Expansion of lateral 4 digits
Action
Flexes proximal phalanges; extends middle and distal phalanges
Origin
Tendon of FDL
Innervation
1st: Medial
2-4 lateral plantar
Quadratus Plantae
Origin
Plantar surface of calcaneus
Insertion
tendon of flexor digitorum longus
Action
Flexes lateral 4 digits
Innervation
Lateral plantar nerve
Flexor hallucis longus tendon
Flexor digitorum longus tendon
1st Layer
Muscles
Abductor digiti minimi
Insertion
Base of 5th phalanx
Origin
Medial and lateral calcaneal tubercle
Action
Abducts 5th digit
Innervation
Lateral plantar nerve
Abductor Hallucis
Insertion
Base of 1st proximal phalanx
Action
Abducts and flexes 1st toes
Innervation
Medial plantar nerve
Origin
Medial tubercle of calcaneus
Flexor Digitorum Brevis
Insertion
Middle phalanges of 2-5 digits
Action
flexes digits 2-5
Origin
Medial and lateral tubercle of calcaneus
Innervation
medial plantar nerve
4th
Plantar Interossei
Insertion
medial phalanges 3-5
Action
Adducts 3-5
Origin
plantar medial sides of 3-5 metarsals
Innervation
Lateral plantar nerve
Dorsal Interossei
Insertion
1st: medial side of phalanx 2
2-4 lateral sides of digits
Action
abducts digits
Origin
Shafts of 1-5 metatarsals
Innervation
Lateral plantar