<prompt> Tinel sign is used for depecting ?To assess the severity of damage of nerveTo classify the type of nerve injuryTo locate the site of nerve injuryTo assess the recovery  <response>: Tinel;s sign is an impoant sign ,which helps in recording the rate of regeneration of nerve clinically . Procedure: gentle percussion is done along the course of injured nerve . Tingling sensation is experienced by the patient in the distribution of injured nerve rather than the area percussed , the sensation should persist for several seconds following the stimulation .Positive tinel;s sign indicate regenerating axonal sprouts have not obtained myelinization .Response fades as myelinization take place . Distal progression of response rate of progression have been used by some to establish the prognosis rate of recovery should be 3cm month Presence of this sign is encouraging . Even a few regenerating sensory fibres can result in positive tinel;s sign . REF:textbook of ohopedics, John ebenezer,4th edition, pg .no. 333 