Nerve06/axon/axonal injury

narrated animation

A skeletal muscle is innervated by the axon of a motor neuron. When the axon is injured, the muscle is denervated. The nerve may be sutured, but the distal portion of the axon will degenerate, which is called Wallerian degeneration. However, the proximal portion of the axon regenerates, and the muscle is reinnervated.

Challenge Quiz

1.

After axon injury, the proximal distal  正解! portion degenerate. This is named after Waller (UK), as Wallerian degeneration.

2.

With axon injury at one point of the axon, most of the supporting cells remain alive degenerate  正解!.

3.

Axonal regeneration takes place along the remaining supporting cells. true false  正解!