Cognitive disorders occurs when a person experiences a loss or interruption of normal thought processes. There are three general types:
Dementia: Latin word for “without mind.” It occurs when a person loses cognitive ability, including memory, thought, language, problem solving, and judgement. A person with dementia operates with only part of their mind. It can include mood changes, problems with communicating and reasoning. It is often associated with brain diseases like Alzheimer's or Parkinson's diseases but it can also be caused by head trauma, or drug and alcohol abuse.
Delirium: this happens when a person becomes disoriented and confused, it can be confused as dementia due to similar symptoms. Delirium happens faster while dementia can take months or years. It can be caused by drugs, including some prescription drugs, certain infections, vitamin deficiencies or head trauma.
Amnestic Disorder: also called amnesia, it involves memory loss. Amnesia can affect different kinds of memories….some amnesiacs remember the past but can't make new memories, others can make new memories but can't remember the past.
photo courtesy: Brain Foundation