BRAIN DISORDER By Nugent, Pam M.S. - April 7, 2013 Any condition that is marked by a disruption to normal functioning. 2. Older term for an acute or chronic mental disorder caused by an impairment in cognition. BRAIN DISORDER: "Joe's brain disorder was shown by him not being able to remember anything." Related Psychology Terms PSYCHIATRIC DISABILITY CAUSALGIA TIC DISORDER ANXIETY DISORDER DUE TO A GENERAL MEDICAL CON BRAIN DISORDER GERIATRIC DISORDER ARTHROGRYPOSIS MULTIPLEX CONGENITA ANXIETY DISTURBANCE PSYCHOSIS BAD TRIP Cite this page: Nugent, Pam M.S., "BRAIN DISORDER," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/brain-disorder-2/ (accessed September 24, 2018).