The medical term dementia does not represent any 1 single illness. It is a term used to describe a medical condition that is characterised by a group of symptoms. Symptoms that are not a regular part of the ageing procedure. The situation can be simplistically defined as a decline in intellectual functioning so severe that the sufferer can not carry out routine activities and tasks.
Dementia associated ailments are caused by the loss of brain chemical substances and the degeneration of cerebral matter which happen when brain cells become broken and die without replacement. That process subsequently leads to the brain retrogressing which induces a progressive loss of normal mental functions. The outcome is dementia. Alzheimer's disease is the commonest trigger of dementia although there are many other illnesses that can lead to the condition.
The term dementia normally implies a permanent state of mental confusion as opposed to delirium which describes a short-term mental disturbance. For this purpose it is fortunate that the degenerative illness usually occurs later in life, rather than early, as it robs victims of the ability to think, keep in mind and purpose. Worst of all the condition is irreversible.
The most noticeable characteristics of dementia are memory loss and confusion. Nevertheless, 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 long-term and emotional memories usually stay nicely preserved until late in the disease. Whereas the events in the immediate past will turn out to be extremely tough (if not not possible) for the dementia sufferer to recall. Other traits typical to the illness consist of irrationality, irritability, and restlessness.