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Anatomy Lower limb d0bc00b2

A man is struck with lathi on lateral aspect of head of fibula. Which of the following can occur as a result of nerve injury

A
Loss of sensation of lateral foot
B
Loss of sensation of adjacent sides of 1st & 2nd toe
C
Inversion inability
D
Dorsiflexion not possible
High-Yield Explanation
The nerve that is injured is common peroneal nerve. It winds around neck of fibula where it divides into superficial and deep peroneal nerves. Its injury causes: Motor loss: to dorsiflexers and eveors of foot causing " foot drop".sensory loss: is to the back of leg , lateral side if the leg and most of the dorsum of foot . aicular loss to lateral side of knee joint. Deep peroneal nerve divides into: Lateral terminal branch- supplies extensor digitorum brevis and tarsal joints Medial terminal branch- supplies skin adjoining 1 st web space of toe and proximal joints of big toe. Superficial peroneal nerve : Supplies skin over lower 1/3 of lat side of leg ,skin over entire dorsum of foot except lat border supplied by sural nerve , medial border upto base of great toe supplied by saphenous nerve cleft between 1 st and 2 nd toes supplied by deep peroneal nerve. Ref: BD Chaurasia ( 7 th edition pg 192)

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