Action.

Muscle.

Origin.

Insertion.

Nerve-supply.

Flexion

Tibialis anticus

From the external tuberosity and upper two-thirds of the outer surface of the shaft of the tibia : the interosseous membrane and deep fascia

The anterior part of the inner surface of the first cuneiform and base of the first metatarsal

Anterior tibial

Extensor communis digitorum

From the outer tuberosity of the tibia and the upper two thirds of the anterior surface of the shaft of the fibula and deep fascia

The muscle divides into four tendons, and is inserted into the four outer toes in the same manner as the extensors of the fingers

Anterior tibial

Extensor proprius hallucis

From the anterior surface of the shaft of the fibula in its middle three fifths ; internal to that of extensor communis digitorum and the interosseous membrane

The base of the terminal phalanx of the great toe (hallux)

Anterior tibial

Peroneus tertius

Is really part of extensor communis digitorum, and arises from the lower part of the anterior surface of the fibula and interosseous membrane

The dorsal surface of the base of the fifth metatarsal

Anterior tibial

Extension

Gastroc- nemius

Plantaris Soleus

These constitute the gro and extend the ankle the foot is on the gro movement from true

up called calf muscles, by raising the heel when and-a slightly different extension of the ankle

Gastrocnemius

See Knee-Joint

Plantaris

See Knee-Joint

Soleus

(1) From the posterior surface of the head and upper two-thirds of the shaft of the fibula; (2) from a fibrous arch between the tibia and fibula; (3) from the oblique line and middle third of the inner border of the tibia

Tendo Achillis

Tibial

Tibialis posticus

From the upper three-fourths of the shaft of the fibula between the oblique line and the interosseous border; the external tuberosity of the tibia and the inner half of the upper two-thirds of the shaft below the oblique line; the interosseous membrane and deep fascia

The plantar surfaces of all the bones of the foot except the first metatarsal. As the tendon passes round the internal malleolus a slip is inserted into the sustentaculum tali

Posterior tibial

Flexor longus digitorum

From the middle half of the posterior surface of the shaft of the tibia internal to that of tibialis posticus and deep fascia

The muscle divides into four tendons, which are inserted into the bases of the terminal phalanges of the four outer toes (cf. flexor profundus digitorum)

Posterior tibial

Flexor longus halluces

From the lower two-thirds of the posterior surface of the shaft of the fibula and the deep fascia

The base of the terminal phalanx of the great toe

Posterior tibial

Inversion and Adduction

Tibialis anticus

See Flexion

Tibialis posticus

See Extension

Eversion and

Abduction

Peroncus longus

From the head and upper two-thirds of the outer surface of the shaft of the fibula

The tendon passes through the groove in the cuboid, and is inserted on the outer surface of the first cuneiform and the base of the first metatarsal

Musculocutaneous

Peroneus brevis

From the lower two-thirds of the outer surface of the shaft of the fibula

The tubercle and outer surface of the base of the fifth metatarsal

Musculocutaneous