Muscles - Foot Flashcards
Abductor Hallucis
O: Medial aspect calcaneal tuberosity
I: Medial side of base proximal phalanx (hallux)
NS: Medial Plantar Nerve (S1-S2)
A: Abduction, flexion of MTP joint, support medial longitudinal arch
Flexor Digitorum Brevis
O: Calcaneal tuberosity and plantar aponeurosis
I: Base of middle phalanges (digits 2-5)
NS: Medial Plantar Nerve
A: Flexion of MTP and IP joints of digits 2-5
Abductor Digiti Minimi
O: Calcaneal tuberosity and plantar aponeurosis
I: Lateral side of base proximal phalanx (5th digit)
NS: Lateral Plantar Nerve (S1-S3)
A: Abduction, flexion of MTP joint
Quadratus Plantae
O: Anterior calcaneus, long plantar ligament
I: Tendons of flexor digitorum longus
NS: Lateral Plantar Nerve (S1-S3)
A: Assists flexor digitorum longus
Flexor Hallucis Brevis
O: Cuboid, lateral cuneiform, medial side 1st met, plantar calcaneocuboid ligament
I: Medial and lateral sides of the proximal phalanx (hallux)
NS: Medial and Lateral Plantar Nerves
A: Flexion of MTP joint (1st digit)
Lumbricals
O: Tendons of flexor digitorum longus
I: Dorsal aponeurosis and medial side extensor expansions
NS: 1st - Medial Plantar Nerve (S2-S3)
2nd-4th - Lateral Plantar Nerve (S2-S3)
A: Flexes MTP joints, extends IP joints
Flexor Digiti Minimi Brevis
O: Base of 5th met, long plantar ligament
I: Lateral side of base proximal phalanx (5th digit)
NS: Lateral Plantar Nerve (S2-S3)
A: Flexes 5th MTP joint
Adductor Hallucis
O: Oblique: Bases of mets 2-4
Transverse: Heads of mets 3-5
I: Base of lateral proximal phalanx (hallux)
NS: Lateral Plantar Nerve
A: Adducts hallux, flexes 1st MTP joint, supports medial and transverse arches of the foot
Plantar Interossei (3)
O: Base and medial borders of mets 3-5
I: Medial base of proximal phalanges and extensor expansions (digits 3-5)
NS: Lateral Plantar Nerve
A: Adduction towards 2nd digit
Extensor Hallucis Brevis
O: Superolateral surface of calcaneus
I: Base of proximal phalanx and extensor expansion (hallux)
NS: Deep Fibular Nerve (L5-S1)
A: Extends 1st MTP joint
Extensor Digitorum Brevis
O: Superolateral surface of calcaneus
I: Bases of middle phalanges and extensor expansions (digits 2-4)
NS: Deep Fibular Nerve (L4-S1)
A: Extends MTP and IP joints (digits 2-4)
Dorsal Interossei (4)
O: 2 heads between adjacent mets
I: Bases of proximal phalanges (2-4)
NS: Lateral Plantar Nerve
A: Abduction from 2nd digit (2nd digit has 2 dorsal interossei)
Opponens Digiti Minimi
O: Long plantar ligament, tendon of Fibularis Longus
I: Lateral shaft of the 5th met
NS: Lateral Plantar Nerve
