Action.

Muscle.

Origin.

Insertion.

Nerve-supply.

Flexion

Flexor longus digitorum

See Ankle-Joint

Accessorius

The outer head from the outer border of the plantar surface of the os calcis and the long plantar ligament; the inner head from the inner surface of the os calcis and long plantar ligament

The upper aspect of the tendons of flexor longus digitorum for second, third, and fourth toes

External plantar

Lumbri-cales

The first from the tibial side of the innermost tendon of the flexor longus digitorum; the others from the adjacent sides of the three outer tendons

The dorsal expansions of the extensor tendons, etc., similar to the lumbricales in the hand

First lumbricales from internal plantar; the others from external plantar

Flexor longus halluces

See Ankle-Joint

Flexor brevis halluces

From the inner part of the plantar surface of the cuboid and the tendon of tibialis posticus

The tendon divides to allow that of flexor longus halluces to pass, and is inserted into the sides of the base of the first phalanx of the great toe

Internal plantar

Flexion {contd.)

Flexor brevis digitorum

From the greater tubercle on the plantar surface of the os calcis ; from the plantar fascia and the deep fascia

The second phalanges of the four outer toes (cf. insertion of flexor sublimis digitorum in the hand)

Internal plantar

Flexor brevis minimi digiti

From the base of the fifth metatarsal bone

The outer side of the base of the first phalanx of the little toe

External plantar

Interossei

See Abduction and Adduction

Extension

Extensor longus digitorum

See Ankle - Joint

Extensor brevis digitorum

From the upper surface of the os calcis in front of the articulation

The innermost tendon is inserted into the base of the first phalanx of the great toe, the others into the dorsal expansions of the next three toes

Anterior tibial

Extensor proprius halluces

See Ankle-Joint

Adduction : to the middle line of the second toe

Adductor obliquus halluces

From the plantar surface of the bases of the second, third, and fourth metatarsal bones

The outer side of the base of the first phalanx of the great toe

External plantar

Adductor transversa halluces

From the capsules of the outer four meta-tarso - phalangeal joints and the transverse metatarsal ligament

The outer side of the base of the first phalanx of the great toe

External plantar

Plantar interossei

From the tibial sides of the third, fourth, and fifth metatarsal bones respectively

With the dorsal muscles on to the tibial sides of third, fourth, and fifth toes

External plantar

Abduction : from t\he middle line of the second toe

Abductor halluces

From the inner side of the greater tuberosity on the plantar surface of the os calcis and the plantar ligament

The inner side of the base of the first phalanx of the great toe

Internal plantar

Abduction (contd.)

Dorsal interossei

By two heads from the adjacent sides of the metatarsal bones

The first and second muscles are inserted on the tibial and fibular side of the second toe respectively ; the two outer muscles are inserted on the fibular side of the third and fourth toes into the dorsal expansions

External plantar

Abductor minimi digiti

From both tubercles on the plantar surface of the os calcis, the plantar fascia, and deep fascia

The outer side of the base of the first phalanx of the little toe

External plantar