Wallerian degeneration is
|A||Necrotic changes that appear in muscle after ischemia.|
|B||The process of degeneration distal to a point of injury to a nerve.|
|C||Seen in bone following infection.|
|D||In a nerve injury the reaction proximal to the point of detachment.|
The process of degeneration distal to a point of injury to a nerve
a. Nerve injury distal to the point of injury is called secondary or Wallerian degeneration.
b. The reaction proximal to the point of injury is called primary or retrograde degeneration and proceeds for at least an internode or more;