Disorganization

 **Thought disorder** refers to disorganized thinking, rambling or shifts from one topic to another. Speech may be mildly disorganized or completely incoherent and incomprehensible.

**Bizarre behavior** may take the form of childlike silliness, agitation, or inappropriate appearance, hygiene, or conduct. Catatonia is an extreme form of bizarre behavior in which people maintain a rigid posture and resist efforts to be moved or, in contrast, display purposeless and unstimulated motor activity.