http://nyneurosurgery.org/cfr/brachial/plexus.htm
This site examines the spinal nerve injuries that result in brachial plexus damage. The diagnosis of this condition requires the use of an electromyogram.

http://www.ninds.nih.gov/patients/disorder/bells/bells.htm
Bell’s palsy is a form of paralysis caused by damage to the seventh cranial nerve. This fact sheet from the NIH briefly discusses the causes, treatments, and prognosis of the condition.

http://www.tna-support.org/
Tic douloureux or trigeminal neuralgia is a painful condition expressed in the areas that the trigeminal nerve innervates. There is a good illustration of the trigeminal nerve.

http://www.ninds.nih.gov/patients/disorder/shydrger/shydrger.htm
Shy-Drager syndrome or multiple system atrophy with autonomic failure may cause hypotension and even blackouts. It sometimes is expressed similarly to parkinsonism and can be treated with similar drugs.