Molaison lost the ability to encode and consolidate newly learned information leading researchers to conclude the medial temporal lobe (MTL) was an important structure involved in this process. After Molaison underwent a bilateral medial temporal lobe resection to alleviate epileptic symptoms the patient began to suffer from memory impairments. The case of Henry Molaison, formerly known as patient H.M., became a landmark in studies of memory as it relates to amnesia and the removal of the hippocampal zone and sparked massive interest in the study of brain lesions and their effect on memory. Systematic studies of anterograde amnesia started to emerge in the 1960s and 1970s. Lateral view of the hippocampus which is located in the medial temporal lobe This led to the suggestion that new memories are fragile in nature but as time passes they become solidified. The two proposed the perseveration-consolidation hypothesis after they found that new information learned could disrupt information previously learnt if not enough time had passed to allow the old information to be consolidated. Coining of the term "consolidation" is credited to the German researchers Müller and Alfons Pilzecker who rediscovered the concept that memory takes time to fixate or undergo "Konsolidierung" in their studies conducted between 18. Burnham a few years later in a paper on amnesia integrating findings from experimental psychology and neurology. This idea was elaborated on by William H. undergoes a process of ripening and maturing during the time which intervenes." The process of consolidation was later proposed based on clinical data illustrated in 1882 by Ribot's Law of Regression, "progressive destruction advances progressively from the unstable to the stable". that the interval of a single night will greatly increase the strength of the memory," and presented the possibility that ". Memory consolidation was first referred to in the writings of the renowned Roman teacher of rhetoric Quintillian. 3.6.1 Cortical slow oscillation- and spindle-complexes.3.5 Emotional and stressful memory consolidation.An Eidetiker will be able to repeat three or four times as many as the average individual. Here the test is to read aloud a long list of digits and ask the subject to repeat them. Occasionally one comes across an acoustic,or auditory, Eidetiker. A true Eidetiker will summon up the image and count the teeth even after several minutes or even hours have elapsed. ![]() An even simpler test is to show him a comb for a moment, then ask him how many teeth it contained. If he is a genuine Eidetiker, he will be able to describe every detail and repeat the number or the letters of the word forward and backward. A similar if not identical phenomenon is occasionally found in patients with tetany and Basedow’s disease (hyperthyroidism).A common test for eidetic imagery is to ask a subject to look briefly at a picture containing many details, including, say, a twelve-digit figure, or a long word in a language he does not know. The images are so vivid and realistic that they are sometimes momentarily mistaken for the actual objects. In addition, adults occasionally experience a form of eidetic imagery for a short time after engaging in fatiguing activity of a monotonous nature, such as playing cards or closely studying blueprints. Some “lightning calculators” are Eidetikers who are able to keep one part of a long problem on their “mental blackboard” while working on another. The few adults who retain this ability can often perform feats of “photographic memory,” such as repeating the entire content of a newspaper page after looking at it for only a few minutes. Some “Eidetikers” claim they can even enlarge portions of the mental picture in order to see them more clearly.Eidetic imagery is found in 5 to 10 per cent of children, but usually disappears before adolescence. They appear to “project” the image on a mental screen and are able to describe every detail as if they were still looking at the object itself. ![]() Mental imagery, usually visual, which closely resembles actual perception.Some people are able to look at a drawing or page of print for a short time and later see it in their “mind’s eye” with amazing vividness.
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