Memories of persons vary depending on the individual's state of mind and the content of the information. There are 2 basic types of memory - Implicit which refers to the unconscious level occurring in basal ganglia and the Explicit that refers to the conscious level (occurring in medial temporal structures). Episodic memory refers to the record of events (episodes) and the relationship with the person. Short term memory is synonymous with working memory. This is a specialized term referring to information about the current task. Commonly also referred to as amnesia, memory loss can be described as a degree of forgetfulness or failure to recall past events which is above the normal level. At times, memory loss is limited to an inability to recall events that are recent, but sometimes it could also be for events from the past or both.
Types of memory loss
Depending upon its cause, memory loss could be sudden or gradual, and permanent or temporary. A transient global amnesia is rare and is a complete but temporary memory loss. In anterograde amnesia on the other hand, the individual cannot recall recent events occurring after a trauma but can recall events of distant past. Retrograde amnesia is when the individual cannot recollect events preceding or leading up to the trauma. But he/she can recall all subsequent events. A transient global amnesia is rare and is a complete but temporary memory loss.
Causes for short term memory loss
Short term memory loss is a symptom of many possible causes including disease, dyslexia, depression, injury or chronic drug and alcohol abuse. Other possible causes for amnesia can be Alzheimer's disease, brain tumor, Creutzfeldt-Jakob disease, meningitis, Parkinson's disease, Pick disease, epilepsy, stroke and West Nile virus. A stroke is construed as one of the most serious reasons for a short term memory loss.
Research findings have established that the structural differences in cortical neurons depend on gonadal hormones in laboratory animals. Other studies on women show that their cognitive tasks changed throughout the menstrual cycle based on the fluctuating estrogen levels.
A head trauma can sometimes result in short term memory loss and this can happen even when concussion is not sustained. Psychiatric disorders such as dissociative fugue, dissociative identity disorder and other types of amnesia can cause short term memory loss. Severe psychological stress can push a person beyond his/her coping abilities can cause memory loss among other mental disturbances. Research reveals that stress hormones kill or inhibit the growth of brain cells adversely affecting memory. The more prolonged the depression, the more extensive the damage. Hormonal imbalance can play havoc and lead to short term memory loss. During menopause, memory loss symptoms are often seen in women.
Treating memory issues
Mental exercises, herbal supplements, certain drugs as well as a healthier lifestyle can all help in treating short term memory loss. If the memory loss is chronic and it interferes with everyday life then it is essential to consult the doctor to identify the cause and eliminate the serious condition.
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Bibliography / Reference
Collection of Pages - Last revised Date: November 17, 2019