Ant compartment of leg

Question 1

How to test the extensor hallucis longus

Answer 1

The big toe is extended against resistance (if normal can see the entire tendon)

Question 2

what is the strongest inverter+ extensor of the foot

Answer 2

tibialis ant

Question 3

why does overuse of the tibias ant cause shin splints

Answer 3

the tibias ant will pull on the crural fascia and the fibres will be torn

Can also cause pain from the saphenous nerve

Question 4

path of the common fibular nerve and what does it inervate

Answer 4

1. descends med to bicep femoris tendon
2. passes of post fibular head and comes superficial in ant compartment
3. will split into deep and superficial fib nerve

IN- knee joint

Question 5

course of deep fibular nerve

Answer 5

• passes deep to extensor digitorum longus
• descends on interossues membrane lateral to ant tibial artery
• travels under extensor halusis longus tendon (entrapment site) and end in two terminal branches

Question 6

course of superficial fib nerve

Answer 6

deep to fibulas longus bw the braves

pierces deep fascia in distal third of leg to innervate skin of inf 1/3 of anterolateral leg and dorsal foot

Question 7

Path of the ant tibial artery

Answer 7

popliteal artery will cross pop fossa from medial to lateral and will split into ant and post tibial artery

ant will cross interosseous and enter ant compartment is med to deep fibular nerve

ends is dorsals pedis artery

Question 8

sup extensor retinacula location and what does it keep in place

Answer 8

on the ant aspect between the 2 epiphysis of the tibia and fibula

-fibularis longus and brevis

Question 9

inf extensor retinacula location

Answer 9

attaches to medial mallous, descend to lat aspect of calcareous and medial navicular

Question 10

Superior extensor retinalum contents

Answer 10

1. synovial sheath of tibias ant tendon
2. ant tibial artery, 2 ant tibial veins, deep fibular n
3. EHL and EDL

Question 11

in extensor retinaculum contents

Answer 11

1. synovial stealth of fib ant
2. synovial sheath of FHL
3. Ant tibial artery, 2 tibial veins, deep fibular n
4. Syn sheath EDL+fib tertius

Question 12

superficial fibular n entrapment (location, sensory and motor deficit)

Answer 12

prox- @ fibular neck
dist- while perforating fascia

sensory- pain and paresthsisa along antlat inf 1/3 of leg, lat malleolus (ant), dorsum of foot

Motor-weakend eversion + plantar flexion

Question 13

cause of deep fib nerve entrapment

Answer 13

excessive use of ant compartment in running/skiing

Question 14

prox entrapment of deep fib nerve and symptoms

Answer 14

within EDL tendon

symptoms- edema, foot drop, pain in webspace

Question 15

distal entrapment of deep fib nerve and symptoms

Answer 15

entrapment under extensor retinaculum and EHB

symptoms- edema, pain 1-2nd web space

Question 16

what are the motor and sensory deficits in an fibular nerve injury

Answer 16

motor- paralysis of extensors and exerts

Sensory- pain and parenthesis on antlat inf 1/3 of leg, ant aspect of lat malleolus, dorsum of foot

Question 17

what nerve is not affected in common fibular nerve injury

Answer 17

lat sural cutaneous

Question 18

how can u test TA

Answer 18

patient is asked to stand on heels or extend foot against resistance

Question 19

what is the extensor digitorum longus muscle test

Answer 19

lat four toes are extended against resistance