Toe extensors Flashcards
name the toe Extensors
Extensor Hallucis Longus, Extensor Digitorum Longus & Brevis, Lumbricals, Interossei.
Extensor hallucis brevis origin
Calcaneus and
inferior extensor retinaculum
Extensor hallucis brevis insertion
Base of the proximal phalanx of the great toe
Extensor hallucis brevis nerve supply
Deep fibular nerve
Extensor hallucis brevis action
Extension of 1st toe
Extensor hallucis brevis function
Running
Extensor digitorum brevis origin
Calcaneus and
inferior extensor retinaculum
Extensor digitorum brevis insertion
Long extensor tendons of toes 2-4
Extensor digitorum brevis nerve supply
Deep fibular nerve
Extensor digitorum brevis action
Extension of the toes 2-5
Extensor digitorum brevis function
Running
Lumbricals origin
Tendon of the flexor digitorum longus
Lumbricals insertion
Medial proximal phalanx and dorsal expansion of the extensor digitorum longus
Lumbricals nerve supply
Lumbrical 1: Medial plantar nerve (S2, S3)
Lumbricals 2-4: Lateral plantar nerve (S2-S3)
Lumbricals action
Flexion at the metatarsophalangeal joints and extension at the interphalangeal joints
Lumbricals function
running
Plantar and dorsal interossei origins
Plantar: medial side of metatarsals 3-5
Dorsal: lateral aspect of the metatarsals
Plantar and dorsal interossei insertions
Plantar: medial sides of the phalanges of digits 3-5
Dorsal: medial side of the proximal phalanx of the second digit and lateral sides of the proximal phalanxes of digits 2-4
Plantar and dorsal interossei nerve supply
Lateral plantar nerve
Plantar and dorsal interossei actions
Plantar: Adduction of the lateral three digits and flexion at the metatarsophalangeal joints
Dorsal: Abduction of the lateral four digits and flexion at the metatarsophalangeal joints
Plantar and dorsal interossei functions
walking
Extensor digitorum longus origin
(Proximal half of) medial surface of fibula, lateral tibial condyle, interosseus membrane
Extensor digitorum longus insertion
Distal and middle phalanges of digits 2-5
Extensor digitorum longus nerve supply
Deep fibular nerve (L5, S1)
Extensor digitorum longus action
Metatarsophalangeal and interphalangeal joints 2-5: Toe extension;
Talocrural joint: Foot dorsiflexion;
Subtalar joint: Foot eversion
Extensor digitorum longus function
walking
