MUSCLES OF ANTERIOR COMPARTMENT OF LEG

PRESENTED BY SAHANA

TIBALIS ANTERIOR MUSCLE

TIBALIS ANTERIOR-ORIGIN Lateral epicondyl of

tibiaUpper two-third of

lateral surface of shaft of tibia

Adjoinig interosseus membrane

TIBALIS ANTERIOR -INSERTIONMedial cuneiformBase of the first

metatarsal bone

TIBALIS ANTERIOR MUSCLE POSTION

TIBALIS ANTERIOR- ACTIONDorsiflexor of the

footInvertor of the foot

EXTENSOR HALLICUS LONGUS MUSCLE

EXTENSOR HALLUCIS LONGUS-ORIGINPosterior half of the

middle two-fourth of the medial surface of the shaft of fibula

Adjoinig part of interosseus membrane

EXTENSOR HALLUCIS LONGUS-INSERTIONDorsal surface of

base of the distal phalanx of the big toe

EXTENSOR HALLICUS LONGUS MUSCLE POSITION

EXTENSOR HALLICUS LONGUS -ACTIONDorsiflexor of the

footExtends

metatarsophalangeal and interphalangeal joints of the big toe

EXTENSOR DIGITORUM LONGUS MUSLE

EXTENSOR DIGITORUM LONGUS-ORIGINLateral condyle of

tibiaWhole of uper one-

fourth and anterior half of middle two –fourth of the medial surface of the shaft of the fibula

Uper part of interosseous membrane

EXTENSOR DIGITORUM LONGUS-INSERTIONIt divides into four

tendons for the lateral four toes.each tendon is joined on the lateral side by a tendon of the extensor edigitorum brevis ,

It is inserted on the bases of the middle and distal phalanges

EXTENSOR DIGITORUM LONGUS MUSCLE POSITION

EXTENSOR DIGITORUM LONGUS-ACTIONDorsiflexor of the

footExtends metatarso

phalangeal ,proximal,distal interphalangeal joints of second-fifth toes

PERONEUS TERTIUS MUSCLE

PERONEUS TERTIUS-ORIGINSeprated part of the

extensor digitorum longus

Lower one-fourth of the medial surface of the shaft of the fibula

Adjoining part of the introsseous membrane

PEROEUS TERTIUS-INSERTIONMedial part of the

dorsal surface of the base of the fifth metatarsal bone

PERONEUS TERTIUS MUSCLE POSITION

PERNEUS TERTIUS-ACTIONDorsiflexor of the

foot Evertor of the foot

EXTENSOR DIGITORUM BREVIS MUSCLE

EXTENSOR DIGITORUM BREVIS-ORIGINSmall muscle

situated on the lateral part of the dorsum of the foot

The muscle arises from anterior part of the superior surface of the calcaneum

The medial tendon is known as extensor hallucis brevis

EXTENSOR DIGITORUM BREVIS-INSERTION The muscle divides

into medial four tendons

the medial tendon is inserted into base of proximal phalanx of the big toe

the other tendon is inserted into 2nd,3rd,4th toes

EXTENSOR DIGITORUM BREVIS MUSCLE POSITION

EXTENSOR DIGITORUM BREVIS- ACTIONMedial tendons

extends metatarsophalangeal joint

Other extends metatarsophalangeal joint and interphalangeal joint of the 2nd,3rd,4th of the dorsiflexed foot

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