<prompt> If C5 ,C6 nerve root is injured, sensations of which pa of upper limb will be lost ?Thumb and index fingerLittle fingerUpper medial pa of armUpper medial side of forearm  <response>: The palmar pad of thumb is innervated by C6 The pad of index finger is innervated by C7. Pad of little finger - C8 Skin on medial aspect of elbow - T1. Ref : Grays Anatomy The Anatomical Basics of Clinical Practice 41 e pg 786. 