ABSTRACT
NERVE INJURY 3. After a peripheral nerve has been divided, which one of the following processes
is responsible for guiding the regenerating axon to the correct distal nerve stump? A. Chromatolysis B. Neurotropism C. Wallerian degeneration
D. Neurotrophism E. Axonal sprouting
MUSCLE DENERVATION 4. Following complete transection of the ulnar nerve at the elbow, which one of the
following is true with regard to muscle denervation? A. The denervated forearm and intrinsic muscles require 75% of their motor end plates to
retain function. B. Following direct repair, the ulnar nerve should regenerate at a rate of 3 mm/day. C. If the intrinsics are not reinnervated within 6 months, they are unlikely to regain normal
function. D. Outcome of muscle reinnervation after ulnar nerve repair is consistent across different age
groups. E. Optimal hand function should be achieved when the forearm muscles are reinnervated
within 3 months of injury.
