Q .PNTL prolonged in all the following except

a) Traumatic injury to anal sphincter

b) Prolonged labor

c) Long standing Rectal prolapse

d) Straining

Answer for premium members (Q4) 

The nerve latency is measured by an electrode which is worn on the finger. It stimulates the pudendal nerve and calculates the conduction time to the anal sphincter

Pudendal nerve terminal latency
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