Behavioral & Psychiatric Symptoms of Dementia
Hallucinations, behavioral changes, paranoid delusions, and long periods of screaming were described by Alzheimer in 1907 in his original case description of the disease.
Behavioral and psychological symptoms of dementia (BPSD) are an integral part of dementia syndrome. A gradual downfall in emotional control or motivation, or a change in social behavior manifesting as emotional lability, irritability, apathy and coarsening of social behavior have been a part of diagnostic criteria for dementia. Studies suggest that cognition and behavior are independent dimensions. However, they influence each other; BPSD is associated with a more rapid rate of cognitive decline and greater impairment in activities of daily living; and there are variations in severity of BPSD at different cognitive levels.