Most people can’t remember the first 3 to 5 years of life. It occurs more frequently in middle-aged and older adults. Scientists think that TGA occurs as the result of seizure-like activity or a brief blockage of the blood vessels supplying your brain. You may experience memory loss in the hours before the attack, and you’ll probably have no lasting memory of the experience. If you develop it, you’ll experience confusion or agitation that comes and goes repeatedly over the course of several hours. Transient global amnesia (TGA) is a poorly understood condition. Your hippocampus plays an important role in forming memories. You can experience it if the area of your brain known as the hippocampus is damaged. For example, you can experience it during a blackout caused by too much alcohol.
When you have anterograde amnesia, you can’t form new memories. Older memories, such as memories from childhood, are usually affected more slowly.Ĭonditions such as dementia cause gradual retrograde amnesia. This type of amnesia tends to affect recently formed memories first. When you have retrograde amnesia, you lose existing, previously made memories. There are multiple types of amnesia, including the following: Retrograde amnesia
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