Near-total absence of REM sleep co-occurring with normal cognition: an update of the 1984 paper

Magidov, Efrat; Hayat, Hanna; Sharon, Omer; Andelman, Fani; Katzav, Shlomit; Lavie, Peretz; Tauman, Riva; Nir, Yuval

doi:10.1016/j.sleep.2018.09.003

Cited by 12 publications

(4 citation statements)

References 14 publications

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“…and law degrees, prepared a new crossword puzzle each week for a major newspaper, and in general led a normal life. He was examined again in greater detail 34 years later at age 68 through a full daytime neuropsychological assessment and four nights in a lab setting while being studied with EEG recordings and a CT scan; he was found to be cognitively normal and still almost devoid of REM sleep and those of REM sleep's concomitants that could be assessed, such as increased heart rate and muscle atonia (Magidov et al, 2018). Just as two or three famous lesion cases studies refocused the study of waking memory, so, too, this unusual case perhaps should be given considerable weight in considering memory consolidation during REM.…”

Section: The Memory-consolidation Theory Of Dreamingmentioning

confidence: 99%

The neurocognitive theory of dreams at age 20: An assessment and a comparison with four other theories of dreaming.

Domhoff

2019

Dreaming

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This article assesses the neurocognitive theory of dreams on the occasion of its 20th anniversary. The theory synthesizes findings from 3 strands of dream research, which focus respectively on the neural substrate that subserves dreaming, the development of dreaming in children, and quantitative findings on adult dream content, all 3 of which are necessary ingredients in any theory in cognitive neuroscience (Ochsner & Kosslyn, 2014). The article compares the current standing of the theory with that of 4 other theories with a neural dimension: the Freudian, activation-synthesis, memory-consolidation, and threat-simulation theories of dreaming. It concludes that the neurocognitive theory differs from the other 4 in that many of its key building blocks were created and have since been replicated by independent investigators in 3 different research areas. The other theories lack a developmental dimension, and their claims sometimes do not accord with established findings on dream content. On the other hand, the neurocognitive theory has been strengthened by neuroimaging findings revealing that the neural substrate that enables dreaming is a subsystem of the default network, which supports imagination in waking; it also includes key hubs in the waking self-system, which may help explain the focus on personal concerns in dreams. This subsystem of the default network, when unconstrained and activated, leads dreamers to experience themselves as being in hypothetical scenarios that include vivid sensory environments, which also usually portray interpersonal interactions. Dreaming is an intensified and enhanced form of spontaneous thought that can be characterized as an "embodied simulation.

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Section: The Memory-consolidation Theory Of Dreamingmentioning

confidence: 99%

The neurocognitive theory of dreams at age 20: An assessment and a comparison with four other theories of dreaming.

Domhoff

2019

Dreaming

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“…In humans we used to believe that REM sleep was necessary for survival. However, in the case where a man suffered a pontine brain injury (caused by shrapnel) he successfully coped with life without REM sleep for decades ( Lavie et al, 1984 ; Magidov et al, 2018 ). REM is an occurrence but is not always a requirement.…”

Section: Discussionmentioning

confidence: 99%

The unified theory of sleep: Eukaryotes endosymbiotic relationship with mitochondria and REM the push-back response for awakening

Adams

O’Brien

2023

Neurobiology of Sleep and Circadian Rhythms

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“…The non‐REM type dreams might occur on a daily basis (except on the days when their sleep is disturbed, Gravett et al, ), but the REM type dreams might occur only every third or fourth day when the elephants take the opportunity to lie down to sleep, indicating muscle atonia associated with REM sleep. This potentially irregular occurrence of REM sleep, and the absence of any clear form of REM sleep in cetaceans (see above), provide an important phylogenetic counter‐argument to the hypothesized association between REM sleep and memory consolidation (Ackermann, Hartmann, Papassotiropoulos, de Quervain, & Rasch, ; Boyce, Glasgow, Williams, & Adamantidis, ; Humiston & Wamsley, , ; Magidov et al, ; Rasch, Pommer, Diekelmann, & Born, ; Siegel, ; Stickgold, ; Tilley & Empson, ; Wyatt, Fram, Kupfer, & Snyder, ).…”

Section: Dreams and Other Mammals That Show Atypical Sleep Patternsmentioning

confidence: 99%

Do all mammals dream?

Manger

Siegel

2020

J of Comparative Neurology

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The presence of dreams in human sleep, especially in REM sleep, and the detection of physiologically similar states in mammals has led many to ponder whether animals experience similar sleep mentation. Recent advances in our understanding of the anatomical and physiological correlates of sleep stages, and thus dreaming, allow a better understanding of the possibility of dream mentation in nonhuman mammals. Here, we explore the potential for dream mentation, in both non-REM and REM sleep across mammals. If we take a hard-stance, that dream mentation only occurs during REM sleep, we conclude that it is unlikely that monotremes, cetaceans, and otariid seals while at sea, have the potential to experience dream mentation. Atypical REM sleep in other species, such as African elephants and Arabian oryx, may alter their potential to experience REM dream mentation. Alternatively, evidence that dream mentation occurs during both non-REM and REM sleep, indicates that all mammals have the potential to experience dream mentation. This non-REM dream mentation may be different in the species where non-REM is atypical, such as during unihemispheric sleep in aquatic mammals (cetaceans, sirens, and Otariid seals). In both scenarios, the cetaceans are the least likely mammalian group to experience vivid dream mentation due to the morphophysiological independence of their cerebral hemispheres. The application of techniques revealing dream mentation in humans to other mammals, specifically those that exhibit unusual sleep states, may lead to advances in our understanding of the neural underpinnings of dreams and conscious experiences.

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Near-total absence of REM sleep co-occurring with normal cognition: an update of the 1984 paper

Cited by 12 publications

References 14 publications

The neurocognitive theory of dreams at age 20: An assessment and a comparison with four other theories of dreaming.

The neurocognitive theory of dreams at age 20: An assessment and a comparison with four other theories of dreaming.

The unified theory of sleep: Eukaryotes endosymbiotic relationship with mitochondria and REM the push-back response for awakening

Do all mammals dream?

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