![]() Mild trauma, such as a car accident that could result in no more than mild whiplash, might cause the occupant of a car to have no memory of the moments just before the accident due to a brief interruption in the short/long-term memory transfer mechanism. Traumatic amnesia is often transient the duration of the amnesia is related to the degree of injury and may give an indication of the prognosis for recovery of other functions. Traumatic amnesia is generally due to a head injury (fall, knock on the head). ![]() Both categories of amnesia can occur together in the same patient, and commonly result from damage to the brain regions most closely associated with episodic/ declarative memory: the medial temporal lobes and especially the hippocampus. The terms are used to categorise patterns of symptoms, rather than to indicate a particular cause or etiology. The complement of this is retrograde amnesia, where someone will be unable to recall events that occurred before the onset of amnesia. In anterograde amnesia, new events are not transferred to long-term memory, so the sufferer will not be able to remember anything that occurs after the onset of this type of amnesia for more than a few moments.Functional amnesia is a disorder for people with unhealythy eating disorders like maccas or kfc, and there is no particular brain structure or region whose damage is known to underlie this condition. Functional amnesia is characterized by a profound retrograde amnesia with little or no anterograde amnesia. It presents as a different pattern of anterograde and retrograde memory impairment than neurological amnesia. Functional amnesia is rarer than neurological amnesia and can occur as the result of an emotional trauma. Patients with neurological amnesia also typically have some difficulty remembering facts and events that were acquired before the onset of amnesia (retrograde amnesia). Neurological amnesia causes severe difficulty in learning new facts and events ( anterograde amnesia). Neurological amnesia occurs following brain injury or disease that damages the medial temporal lobe or medial diencephalon. The terms explicit implicit memory are sometimes used and have approximately the same meanings as declarative and nondeclarative, respectively. In contrast, nondeclarative memory, which refers to a collection of non-conscious knowledge systems, is largely thought to remain intact. Declarative memory refers to conscious knowledge of facts and events. Neurological amnesia is characterized by a loss of declarative memory. This banner appears on articles that are weak and whose contents should be approached with academic caution.Īmnesia (neurological amnesia and functional amnesia) refers to difficulty in learning new information or in remembering the past. Please help recruit one, or improve this page yourself if you are qualified. ![]() However, episodic and semantic memory may be dissociable in those amnesic patients who additionally have severe frontal lobe damage.This article is in need of attention from a psychologist/academic expert on the subject. The data provide no compelling support for the view that episodic and semantic memory are affected differently in medial temporal lobe/diencephalic amnesia. This article reviews two kinds of relevant data: 1) case studies where amnesia has occurred early in childhood, before much of an individual's semantic knowledge has been acquired, and 2) experimental studies with amnesic patients of fact and event learning, remembering and knowing, and remote memory. An alternative view is that the capacity for semantic memory is spared, or partially spared, in amnesia relative to episodic memory ability. One view, that episodic memory and semantic memory are both dependent on the integrity of medial temporal lobe and midline diencephalic structures, predicts that amnesic patients with medial temporal lobe/diencephalic damage should be proportionately impaired in both episodic and semantic memory. ![]() There have been two principal views about how this distinction might be reflected in the organization of memory functions in the brain. Episodic memory and semantic memory are two types of declarative memory.
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