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3 types of amnesia psychology8/13/2023 Because memory is so fragile, witnesses can be easily (and often accidentally) misled due to the problem of suggestibility. When someone witnesses a crime, that personâs memory of the details of the crime is very important in catching the suspect. People may not intend to distort facts, but it can happen in the process of retrieving old memories and combining them with new memories (Roediger and DeSoto, in press). New events can be added and we can change what we think we remember about past events, resulting in inaccuracies and distortions. A memory pulled from long-term storage into short-term memory is flexible. Yet as we retrieve our memories, we also tend to alter and modify them. The formulation of new memories is sometimes called construction, and the process of bringing up old memories is called reconstruction. View the video story profiling Scott Bolzanâs amnesia and his attempts to get his life back. He is now living with one of the most extreme cases of retrograde amnesia on record. Bolzan fell, hit his head, and deleted 46 years of his life in an instant. However, for real-life sufferers of retrograde amnesia, like former NFL football player Scott Bolzan, the story is not a Hollywood movie. This may sound like the stuff of Hollywood movies, and Hollywood has been fascinated with the amnesia plot for nearly a century, going all the way back to the film Garden of Lies from 1915 to more recent movies such as the Jason Bourne trilogy starring Matt Damon. You donât remember anything about your life prior to waking up in the hospital. You were in a car accident, suffered a head injury, and now have retrograde amnesia. What if you woke up in the hospital one day and there were people surrounding your bed claiming to be your spouse, your children, and your parents? The trouble is you donât recognize any of them. They have difficulty remembering episodic memories. People with retrograde amnesia cannot remember some or even all of their past. Retrograde amnesia is loss of memory for events that occurred prior to the trauma. Conversely, memory problems that extend forward in time from the point of injury and prevent the formation of new memories are called anterograde amnesia. Memory problems that extend back in time before the injury and prevent retrieval of information previously stored in long-term memory are known as retrograde amnesia. This diagram illustrates the timeline of retrograde and anterograde amnesia. However, when presented the same puzzle several days in a row, although he did not remember having seen the puzzle before, his speed at solving it became faster each day (because of relearning) (Corkin, 1965, 1968). and then you left the room for a few minutes, he would not know you upon your return and would introduce himself to you again. He also could not remember people he had met after his surgery. would read the same magazine over and over, having no memory of ever reading itâit was always new to him. The brain damage caused by his surgery resulted in anterograde amnesia. Many people with this form of amnesia are unable to form new episodic or semantic memories, but are still able to form new procedural memories (Bayley & Squire, 2002). This suggests that damage to the brain has resulted in the inability to transfer information from short-term to long-term memory that is, the inability to consolidate memories. The hippocampus is usually affected (McLeod, 2011). With anterograde amnesia, you cannot remember new information, although you can remember information and events that happened prior to your injury. Anterograde amnesia is commonly caused by brain trauma, such as a blow to the head. There are two common types of amnesia: anterograde amnesia and retrograde amnesia ( Figure). The only exception is the experiences that, at any time, he has had in the last minute or two. His episodic amnesia covers his whole life, from birth to the present. The outstanding fact about K.C.'s mental make-up is his utter inability to remember any events, circumstances, or situations from his own life. suffered a traumatic head injury in a motorcycle accident and then had severe amnesia. Psychologist Tulving (2002) and his colleagues at the University of Toronto studied K. Amnesia is the loss of long-term memory that occurs as the result of disease, physical trauma, or psychological trauma.
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