Muscle Actions and Origin/Insertions Flashcards
What is the origin and insertion of the abductor digiti minimi?
Originates at the calcaneal tuberosity, and inserts on the base of the 5th proximal phalanx
What’s the action of abductor digiti minimi?
Abduction and flexion of the 5th
What is the origin and insertion of abductor hallucis?
Originates on medial side of calcaneal tuberosity, and inserts on the base of the proximal phalanx of the hallux
What is the action of abductor hallucis?
Flexion and abduction of the hallux
What is the origin and insertion of extensor digitorum brevis?
Originates on the superolateral surface of the calcaneus, and inserts on the bases of the middle phalanges 1-4
What is the action of extensor digitorum brevis?
Toe extension at MTP joints
What is the origin and insertion of extensor digitorum longus?
Originates on the lateral tibial condyle and the proximal 3/4 of the fibula, inserts on the middle and distal phalanges of 2-5
What is the action of extensor digitorum longus?
Prime toe extensor, as well as dorsiflexion of the ankle and eversion
What is the origin and insertion of extensor hallucis longus?
Originates on the medial fibula and interosseous membrane, and inserts on the dorsal distal phalanx of the big toe
What is the action of extensor hallucis longus?
Dorsiflexion of the hallux, dorsiflexion of the ankle, and inversion of the ankle
What is the origin and insertion of fibularis tertius?
Originates on the distal 1/3 of the medial fibula and the anterior surface of the interosseous membrane, and inserts on the proximal medial surface of the base of the 5th MT
What is the action of fibularis tertius?
Dorsiflexion of the ankle, eversion of the foot
What is the origin and insertion of flexor digitorum brevis?
Originates on the calcaneal tuberosity, and inserts on the middle phalanx of digits 2-5
What is the action of flexor digitorum brevis?
Aids in toe flexion
What is the origin and insertion of flexor digitorum longus?
Originates on the posterior tibia, and inserts on the bases of the distal phalanges of digits 2-5
What is the action flexor digitorum longus?
Plantar flexion, inversion, and flexion of MTPJ and IPJ 2-5
What is the origin and insertion of flexor digiti minimi brevis?
Originates on the base of the 5th MT, and inserts on the base of the proximal phalanx of the 5th digit
What is the action of flexor digiti minimi brevis?
Flexion of the 5th toe at the MTPJ
What is the origin and insertion of flexor hallucis brevis?
Originates on the inferior midfoot (cuboid bone/lateral cuneiform), and inserts via two tendons on both sides of the base of the 1st proximal phalanx. Each tendon has a sesamoid
What is the action of flexor hallucis brevis?
Flexion of 1st MTPJ
What is the origin and insertion of peroneus brevis?
Originates on the distal fibula, wraps posterior to the lateral malleolus and inserts on the proximal end of the 5th MT
What is the action of peroneus brevis?
Plantar flexion and eversion of the foot
What is the origin and insertion of peroneus longus?
Originates on the lateral surface of the proximal fibula, and inserts on the plantar surface of the medial cuneiform and base of the 1st MT
What is the origin and insertion of tibialis anterior?
Originates on the lateral tibial condyle, and inserts into the inferior surface of the medial cuneiform and 1st MT bone
