Understanding memory loss
Memory is the process by which information is received, stored, and retrieved. When we first receive information, it is first encoded in a form that allows storage. Storage ensures that we maintain information over a significant period of time. Retrieval of information entails locating it from storage and bringing it back into consciousness.
Immediate memory allows recall for a period of several seconds to a minute without rehearsal. By contrast, long-term memory can store much larger quantities of information for potentially unlimited duration (sometimes a whole lifetime). Its capacity is immeasurably large.
Most dementias are characterised by abnormal forgetfulness with limited ability to recall recent events and information. Although the normal ageing process can result in difficulty in learning and retaining new material, normal ageing itself is not a cause of significant memory loss unless there is accompanying disease that is responsible for the memory deficit, such as dementia.
What is mild cognitive impairment?
Mild Cognitive Impairment (MCI) causes a modest but noticeable and measurable decline in cognitive abilities including memory and thinking skills. A person with MCI is by and large still able to function at his or her usual level but is at an increased risk of developing dementia.
Next Chapter: UNDERSTANDING DEMENTIA
