1. Schizophrenia  (Trust Mark: Doctor-Reviewed)
Schizophrenia is a mental disorder that makes it difficult to tell the difference between real and unreal experiences, to think logically, to have normal emotional responses, and to behave normally in social situations.• Reviewer: Christos Ballas, MD, Attending Psychiatrist, Hospital of the University of Pennsylvania, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

2. Catatonia  (Trust Mark: Doctor-Reviewed)
Catatonia is a disturbance of motor behavior that can have either a psychological or neurological cause. Its most well-known form involves a rigid, immobile position that is held by a person for a considerable length of time— often days, weeks...• Author: Barbara Sternberg Ph.D.