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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Intermediate-term memory ： ウィキペディア英語版 Intermediate-term memory Intermediate-term memory (ITM) is a stage of memory distinct from sensory memory, working memory/short-term memory, and long-term memory. While sensory memory persists for several milliseconds, working memory persists for up to thirty seconds, and long-term memory persists from thirty minutes to the end of an individual's life, intermediate-term memory persists for about two to three hours. This overlap in the durations of these memory processes indicates that they occur simultaneously, rather than sequentially. Indeed, intermediate-term facilitation can be produced in the absence of long-term facilitation. However, the boundaries between these forms of memory are not clear-cut, and they can vary depending on the task. Intermediate-term memory is thought to be supported by the parahippocampal cortex. In 1993, Rosenzweig and colleagues demonstrated that, in rats conditioned to avoid an aversive stimulus, percent avoidance of the stimulus (and, by implication, memory of the aversive nature of the stimulus) reached relative minima at one minute, fifteen minutes, and sixty minutes. These dips were theorized to correspond to the time points in which the rats switched from working memory to intermediate-term memory, from intermediate-term memory to the early phase of long-term memory, and from the early phase of long-term memory to the late phase of long-term memory, respectively—thus demonstrating the presence of a form of memory that exists between working memory and long-term memory, which they referred to as "intermediate-term memory". Though the idea of intermediate-term memory has existed since the 1990s, Sutton ''et al.'' introduced a novel theory for the neural correlates underlying intermediate-term memory in ''Aplysia'' in 2001, where they described it as the primary behavioral manifestation of intermediate-term facilitation. ==Characteristics== In 2001, Sutton and colleagues proposed that intermediate-term memory possesses the following three characteristics: *Its induction requires translation, but ''not'' transcription〔 *Its expression requires the persistent activation of protein kinase A〔 and protein kinase C *It declines completely before the onset of long-term memory〔 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.