Anterior and Lateral Leg

Question 1

fascia of the thigh and leg superior to inferior

Answer 1

fascia lata (thigh)
crural fascia(leg)
Superior extensor retinaculum (ankle)
inferior extensor retinaculum (foot)

Question 2

anterior compartment (medial to lateral)
and function

Answer 2

tibialis anterior, extensor hallucis longus, extensor digitorum longus, (fibularis tertius too)
-function = dorsiflexion and toe extension

Question 3

tibialis anterior origin and insertion

Answer 3

on lateral tibial condyle, attaches medial surface first medial cuneiform and first metatarsal base

Question 4

tibialis anterior function

Answer 4

dorsiflexion and inversion

Question 5

extensor digitorum longus origin and insertion

Answer 5

lateral tibial condyle and anterior fibular surface and interosseous membrane
-insertion: 4 tendons of digits 2-5 form extensor expansion over dorsum

Question 6

extensor digitorum longus function

Answer 6

extends lateral four digits

dorsiflexion

Question 7

function of fibularis tertius

Answer 7

dorsiflexion and eversion

Question 8

what does the fibularis tertius fuse with?

Answer 8

extensor digitorum longus proximally, tendon does not attach to a digit

Question 9

extensor hallucis longus insertion

Answer 9

base distal phalanx of hallux

Question 10

extensor hallucis longus function

Answer 10

extend hallux and dorsiflex ankle

Question 11

nerve supply to the anterior compartement?

Answer 11

deep fibular nerve

Question 12

what does the deep fibular nerve supply

Answer 12

Anterior compartment muscles, metacarpal phalangeal and ankle joint, dorsal instrinsic foot muslces, skin between first and second digits (Aunt maddie always sucks dick)

Question 13

what landmark gives approximate point of division of anterior and posterior tibial arteries?

Answer 13

tibial tuberosity

Question 14

anterior tibial artery route to ankle

Answer 14

passes anteriorly over interosseous membrane and goes anterior surface between TA and EHL with deep fibular nerve
ends at the ankle between malleoli = dorsalis pedis artery

Question 15

muscles of lateral compatment

Answer 15

fibularis brevis and fibularis longus

Question 16

where does fibularis longus insert?

Answer 16

runs obliquely and distally across sole of foot and attaches distally to first metatarsal and medial cuneifrom

Question 17

fibularis longus function?

Answer 17

strong eversion and plantarflexion

Question 18

fibularis brevis function?

if didn’t evert then?

Answer 18

eversion and plantarflexion

-constantly sprained ankle

Question 19

where does fibularis brevis insert?

Answer 19

tuberosity of 5th metatarsal

Question 20

what does the superficial fibular nerve in distal third of leg?

Answer 20

becomes superficial and supplies anteroinferior leg, dorsal surface foot and dorsal digits (DAD)

Question 21

damage to common fibular nerve causes?

Answer 21

loss of dorsiflexion and eversion causes a foot drop.
can’t achieve heel strike, patient has high stepping gait. leg swings forward the foot strikes with a clop.
-loss of sensation along anterolateral leg and dorsum of foot

Question 22

broken tibia can cause?

Answer 22

bleeding into compartment but can’t go anywhere bc you have tight fascia holding it in. this leads to intracompartmental pressure and can lead to ischemia and permanent injury. Fasciotomy can be performed to relieve pressure

Question 23

shin splints form from?

Answer 23

microtrauma to tibialis anterior, inducing small tears to periosteum over tibia and or tears to overlying deep fascia.
-mild form of compartmental syndrome