occurs in the section of the axon proximal to the site of injury 

typically begins within 7 days of a lesion

occurs in the section of the axon distal to the site of injury 

is observed in neurapraxia injuries

crossed extensor reflex.

stretch reflex.

autogenic inhibition reflex.

flexor reflex.

both sympathetic and parasympathetic nerves.

two nerves from the spinal cord.

nerves from both the brain and the spinal cord.

both autonomic and somatomotor nerves.

To provide the cerebellum with feedback information concerning which motor impulses have arrived at the anterior motor neurons of the spinal cord.

To sense muscle tension and equalize the contractile force exerted by groups of muscle fibers in a muscle

To sense the length of the muscle tendon in which it is located.

To transmit muscle stretch information to higher brain centers.

Neuropraxia

Neurotmesis

Lacerations

Axonotmesis

can be somatic or autonomic

have one synapse

have only two neurons

have no interneurons

Acetylcholine

Serotonin

Norepinephrine

Dopamine