The medical term dementia does not represent any one single disease. It is a term used to describe a medical situation that is characterised by a group of symptoms. Symptoms that are not a regular component of the ageing procedure. The situation can be simplistically defined as a decline in intellectual functioning so severe that the sufferer can not perform routine activities and tasks.
Dementia related ailments are brought on by the loss of brain chemical substances and the degeneration of cerebral matter which occur when brain cells become broken and die without replacement. That procedure subsequently leads to the brain retrogressing which induces a progressive loss of normal mental functions. The result is dementia. Alzheimer's illness is the commonest trigger of dementia even though there are many other illnesses that can lead to the situation.
The term dementia normally implies a permanent state of mental confusion as opposed to delirium which describes a temporary mental disturbance. For this reason it is fortunate that the degenerative disease generally occurs later in life, rather than early, as it robs victims of the capability to believe, remember and reason. Worst of all the condition is irreversible.
The most noticeable characteristics of dementia are memory loss and confusion. However, the failure of memory is of a distinctive type. The sufferer will truly believe that events which took place many years earlier (50 to 70 years) had just occurred (displacement of time). The lengthy-term and emotional memories usually stay well preserved until late in the disease. Whereas the events in the instant previous will become extremely difficult (if not impossible) for the dementia sufferer to recall. Other traits typical to the disease consist of irrationality, irritability, and restlessness.