Cipolli C, Baroncini P, Fagioli I, Fumai A, Salzarulo P
Institute of Human Physiology, University of Modena, Italy.
Sleep. 1987 Oct;10(5):473-9. doi: 10.1093/sleep/10.5.473.
It has been found that the contents of mental sleep experience (MSE) in rapid eye movement (REM) sleep are often interrelated. The aim of this study was to see whether this interrelatedness is better accounted for by the hypothesis that the mental sleep experience interrupted by provoked awakening is resumed when the subject returns to sleep (resumption), or by the hypothesis that the same contents are elaborated repeatedly throughout the night (iterative processing). We also aimed to gain some information as to the processes by which contents previously stored in memory are retrieved and inserted into the current MSE. Ten subjects were awakened 4 times on each of 4 nights after 9 min of REM sleep, and the contents of all the possible pairings of reports were scored and compared with respect to the factors "night" (same/different), "report continguity" (contiguous/noncontinguous reports), "unit interrelated" (lexical/propositional), and "interrelationship" (paradigmatic/syntagmatic). Both the occurrences and the frequencies of interrelations were greater for same night pairs than for different night pairs, but without significant differences between contiguous and noncontiguous pairs: these data provide support for the iterative processing hypothesis. The units interrelated in pairs of reports are more frequently at a lexical than a propositional level and show more paradigmatic than syntagmatic interrelationships: these data suggest that the reelaboration of contents of previous MSEs occurs mainly at a local level, making for the coherence, rather than the thematic, progression of the MSE narrative.
人们发现，快速眼动（REM）睡眠中的心理睡眠体验（MSE）内容往往相互关联。本研究的目的是探讨这种关联性是否能更好地由以下两种假设来解释：一种假设是，被诱发唤醒打断的心理睡眠体验在受试者重新入睡时会恢复（恢复假设）；另一种假设是，相同的内容在整个晚上会被反复加工（迭代加工假设）。我们还旨在获取一些关于先前存储在记忆中的内容被检索并插入到当前MSE中的过程的信息。10名受试者在REM睡眠9分钟后，在4个晚上中的每个晚上被唤醒4次，对所有可能的报告配对内容进行评分，并就“夜晚”（相同/不同）、“报告连续性”（连续/非连续报告）、“单元相关性”（词汇/命题）和“相互关系”（范式/组合）等因素进行比较。相同夜晚配对的相互关系出现次数和频率都高于不同夜晚配对，但连续和非连续配对之间没有显著差异：这些数据为迭代加工假设提供了支持。报告配对中相互关联的单元在词汇层面比在命题层面更频繁，并且显示出更多的范式而非组合相互关系：这些数据表明，先前MSE内容的重新加工主要发生在局部层面，有助于MSE叙述的连贯性而非主题性推进。
