By Steve Bressert, Ph.D. Narcissistic Personality Disorder is a disorder that is characterized by a long-standing pattern of grandiosity (either in fantasy or actual behavior), an overwhelming need for admiration, and usually a complete lack of empathy toward others.
Idiopathic sensory-motor polyneuropathy is an illness where sensory and motor nerves of the peripheral nervous system are affected and no obvious underlying etiology is found. In many respects, the symptoms are very similar to diabetic polyneuropathy.
The process begins with an unperceived trauma or injury to an insensate joint. The sensory neuropathy renders the patient unaware of the osseous destruction that occurs with ambulation. This microtrauma leads to progressive destruction and damage to bone and joints.