Injury to the median nerve is manifested as: thumb abduction dysfunction and thumb and index finger pinching dysfunction due to thumb short abductor muscle paralysis, palmar radial half, thumb, index, middle and ring finger radial half palmar surface, thumb interphalangeal joint and index, middle and ring finger radial half proximal interphalangeal joint to distal sensory dysfunction, mainly manifested as loss of sensation in the index finger. So what are the index finger sensory examination items? The following will be introduced for you. Index finger sensory examination items 1, wound examination Check the presence of wounds, if there is a wound, the scope and depth, soft tissue damage and the presence of infection should be checked. Find out the path of gunshot wound or shrapnel wound, whether there is vascular injury, fracture or dislocation, etc. If the wound has healed, observe the scar situation and the presence of aneurysm or arteriovenous fistula formation, etc. 2.Imaging In brachial plexus radical avulsion injury, CTM (myelography plus computed tomography) can show extravasation of contrast agent into the surrounding tissue space, dural sac tear, spinal membrane bulge, spinal cord displacement, etc. In general, most spinal bulges imply a tear of the nerve root, or although there is partial continuity of the nerve root present, the internal damage has been severe and has continued to a very close plane, often suggesting a large enough force to cause a tear of the arachnoid membrane. MRI (magnetic resonance imaging) can show not only the tear of the nerve root, but also the coexisting spinal membrane bulge, cerebrospinal fluid leakage, spinal cord hemorrhage, edema, etc.