Compared with neurotmesis, axonotmesis generally has a more favorable prognosis because:

• A. The axon spontaneously regrows without guidance
• B. The connective tissue framework is disrupted
• C. The connective tissue framework remains intact, guiding regrowth
• D. Regrowth is disordered and slow

Answer: (C)

The key idea is that the remaining connective tissue scaffolding within the nerve provides a built-in guide for regrowing axons. In axonotmesis, the axon and myelin are damaged, and distal segments undergo Wallerian degeneration, but the endoneurial tubes and surrounding connective tissue remain intact. Those intact channels offer directional pathways for regenerating axons to reinnervate their original targets, leading to more organized and potentially functional recovery. In contrast, neurotmesis involves a complete disruption of the nerve trunk with loss of this guiding framework, so regrowth is disorganized and far less reliable unless surgical repair or grafting restores an appropriate path. Hence, axonotmesis tends to have a more favorable prognosis because the connective tissue framework remains intact, guiding regrowth. Regrowth rate is typically about 1–3 mm per day, and outcome depends on distance to the target and accuracy of reinnervation.