Ant compartment of leg muscles

Question 1

Tibialis Ant- O, I, IN, A

Answer 1

O- lat tip condyle, 1/2 lat surface of tibial shaft, interosseous

I- med+inf surfaces of medial uniform and base of 1st metatarsal

IN- deep fibular n (l4,l5,s1)

A- exten, inverts foot, supports med arch

Question 2

Extensor hallusis longus- O, I, IN, A

Answer 2

O- middle third of ant surface of fibula, interosseous

I- base of distastes phalanx of big toe

IN- deep fibular n (l4,5,s1)

A- extends foot/big toe

Question 3

Extensor digitorum longus- O, I, IN, A

Answer 3

O- lat tibial condyle, prox 3/4 of ant/med surface of fib, interossues, crural fascia

I-extensor expansion

IN- Deep fib (l4,5,S1)

A- extends foot and lat 4 toes

Question 4

Fibularis Tertius- O, I, IN, A

Answer 4

O- inf third of med surface of fib, interosseous

I- base and dorsal med surface of shaft of 5th metatarsal

IN- deep fibular

A- extends, everts foot

Question 5

extensor digitorum brevis

Answer 5

O- superolateral calc

I- bases of middle phalanges of 2-4

IN-deep fibular (l4,l5,s1)

A- ex of metapharngeal + interpharegeal

Question 6

extensor hallusis brevis

Answer 6

O- superolateral calc

I- base of prox phalanx of hallusis

A- extend metapharengeal

IN- deep fib (l4,l5,s1)