This damage can be due to an injury, surgery, alcohol, or even a deficiency in thiamine. It’s generally agreed upon that this type of amnesia is caused by damage to the hippocampus, which is a section of your brain. If you’re a movie buff, you’ll recognize this type of amnesia from the movie 50 First Dates. However, this type of amnesia can also be permanent. For example, if you enter a blackout from drinking too much, you can experience anterograde amnesia. The effect of anterograde amnesia can be temporary. Anterograde AmnesiaĪnterograde amnesia, on the other hand, exists when you have the inability to form new memories. Retrograde amnesia can be diagnosed through an MRI scan or CT scan, blood tests, a neurological examination, a cognitive test, or an electroencephalogram, which checks for seizure activity. Encephalitis (inflammation of the brain due to a viral infection).Traumatic brain injury (you can read more here about traumatic brain injuries and concussions).Other diseases and conditions that can cause retrograde amnesia include: Older memories, such as childhood memories, are usually affected at a slower rate.Ĭertain diseases, such as dementia, can cause retrograde amnesia. With this type of amnesia, your newest memories are usually affected first. Retrograde amnesia occurs when you lose previously made or existing memories. Now that you know a bit about the basics of amnesia, let’s talk about retrograde vs anterograde amnesia. Retrograde Amnesia vs Anterograde Amnesia Mild memory loss is something we all deal with as we age, whereas amnesia is a much more severe, significant form of memory loss. It’s also important to note that amnesia is different from mild memory loss. However, people with amnesia usually retain their motor skills as well as knowledge of their own identity. Some people suffer from a type of amnesia in which they can’t form new memories, whereas others suffer from a type of amnesia in which they can’t recall past experiences or certain facts. In simple terms, amnesia is a type of memory loss. 3 Retrograde vs Anterograde Amnesia: Wrap Upīefore we get into the difference between retrograde vs anterograde amnesia, let’s first discuss what amnesia is exactly.2 Retrograde Amnesia vs Anterograde Amnesia. On the basis of these findings, and related observations in the published literature, it is proposed that recovery from some types of human amnesia, such as that associated with TGA, follows a 'lateral-to-medial' rule-lateral inferotemporal areas that play a major role in retrograde amnesia recover first from hypometabolism related to the TGA attack, followed by 'interface' areas such as the rhinal and parahippocampal cortices that are considered to have a role in both anterograde and retrograde memory functioning, with the last areas to recover physiological integrity being discrete limbic-diencephalic structures such as the hippocampus. Within anterograde amnesia, picture recognition memory preceded recovery of story recall memory. Within retrograde amnesia for public events, there was a temporal gradient of memory loss, with more recent events affected to a greater degree than earlier events. Resolution of a naming deficit more closely paralleled recovery from retrograde amnesia rather than anterograde amnesia. Recovery of retrograde amnesia preceded recovery from anterograde amnesia. This allowed us to conduct the first quantitative study where shrinkage of anterograde and retrograde memory loss was plotted at four separate intervals throughout the acute recovery process, and also 24 hr later. Evidence is offered from the perspective of a study of recovery of function during an episode of transient global amnesia (TGA) that occurred as a complication of a cerebral angiographic procedure being carried out in a neurosciences centre, and where there was therefore a unique opportunity to examine acute changes in memory function. There are few clues as to the processes that underlie recovery of function from human amnesia.
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