Dorsal and plantar muscles of the foot Flashcards
Extensor Digitorum brevis (dorsal)
Origin - calcaneus and inferior extensor retinaculum
Insertion - Extensor tendons of 4 digits
Innervation - Deep peroneal nerve
Action - extends 4 digits at MTP and IP joints
Extensor Hallucis brevis (dorsal)
Origin - calcaneous and inferior retinaculum
Insertion - proximal phalanx of big toe
Innervation - deep peroneal nerve
Action - extends big toe at MTP and IP joints
Abductor hallucis
Origin - Calcaneous, flexor retiaculum and plantar aponeurosis
Insertion - proximal phalanx of big tow
Innervation - medial plantar nerve
Action - abducts and flexes bog toe
Flexor digitorum brevis
Origin - calcaneus and plantar aponeurosis
Insertion - middle phalange of lateral 4 digits
Innervation - medial plantar nerve
Action - Flexion of lateral 4 digits at IP joint
Abductor digiti minimi
Origin - calcaneous and plantar aponeurosis
Insertion - proximal phalanx of little toe
Innervation - lateral plantar nerve
Action - abducts and flexes little toe
Quadratus plantae
Origin -calcaneus
Insertion - tendons of flexor digitorum longus
Innervation - lateral plantar nerve
Action - flexion of lateral 4 digits
Lumbricals x 4
Origin - tendon of flexor digitorum longus
Insertion - proximal phalanx of lateral 4 digits
Innervation - medial one = medial plantar nerve, other 3 lateral plantar nerve
Action - flexion at MTP and extension at IP
Flexor hallucis brevis
Origin - cuboid, medial cuniform and tendon of tibialis posterior
Insertion - proximal phalanx of great toe
Innervation - medial plantar nerve
Action - flexion of 1st MTP joint
Adductor hallucis
Origins
oblique head = 2nd, 3rd and 4th metatarsals
transverse head = plantar ligaments of the MTP joints
Insertion - proximal phalanx of great toe
Innervation - lateral plantar nerve
Action - adducts great toe and forms the transverse arch of the foot
Flexor digiti minimi brevis
Origin - 5th metatarsal
Insertion - proximal phalanx of little toe
Innervation - lateral plantar nerve
Action - flexes MTP joint of 5th digit
Plantar Interossi x3
Origin - medial side
of 3-5 metatarsals
Insertion - medial side of proximal phalanx of digits 3-5
Innervation - lateral plantar nerve
Action - adducts digits 3rd to 5th digit
Dorsal interossi x4
Origin - inbetween metatarsals 1-5
Insertion - 1st to medial side of 2nd phalanx the rest to the lateral side of their respective phalanx
Innervation - lateral plantar nerve
Action - abducts 2nd to 5th digitsand flexes MTP joint.
