Alzheimer’s disease is a neuro-degenerative which progressively brings about the loss of cognitive mental functions, following the degeneration of cerebral tissue, and leading to a form of dementia. The most striking symptom of the disease is short term memory loss, whilst the oldest memories remain relatively intact. Other developments involve a loss of dexterity in controlling movements and losing recognition skills. Its exact cause is still unknown, but it is thought that both environmental and genetic factors contribute towards it. Until the 1960s the disease was believed to be rare, and it was attributed to ageing aspects and a slowing down of vital activity. The disease was discovered by Aloïs Alzheimer (1864-1915), a German psychiatric doctor and neuro-pathologist who studied the brains of people affected by dementia.