 Cuthbertson House is a critical entry and assessment ward for people whose mental illness has been caused by a brain impairment, also known as organic mental illness – "this type of illness is usually caused by disease affecting the brain.Dementia such as Alzheimer’s disease is an example of organic illnesses".Timbury House is a ward for patients older than 65 who suffer from a functional mental illness – "this type of illness has a predominantly psychological cause.