Dreaming, Handedness, and Sleep Architecture: Interhemispheric Mechanisms

Christman, Stephen D.; Propper, Ruth E.

doi:10.1016/s0074-7742(10)92011-4

Cited by 7 publications

(8 citation statements)

References 73 publications

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“…A cut-off-score ≥5 suggested by Buysse et al [14] was used to exclude participants with unhealthy sleep. Because of a possible influence on the sleep architecture [15], samples were limited to right-handed participants, as measured by self-report and the Edinburgh Handedness Inventory [16], and non-smokers [17]. The Digit Span Forward test from the WMS-R [18] was used to make sure that concentration and working memory of all participants were average at minimum.…”

Section: Methodsmentioning

confidence: 99%

Selective REM-Sleep Deprivation Does Not Diminish Emotional Memory Consolidation in Young Healthy Subjects

et al. 2014

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Sleep enhances memory consolidation and it has been hypothesized that rapid eye movement (REM) sleep in particular facilitates the consolidation of emotional memory. The aim of this study was to investigate this hypothesis using selective REM-sleep deprivation. We used a recognition memory task in which participants were shown negative and neutral pictures. Participants (N = 29 healthy medical students) were separated into two groups (undisturbed sleep and selective REM-sleep deprived). Both groups also worked on the memory task in a wake condition. Recognition accuracy was significantly better for negative than for neutral stimuli and better after the sleep than the wake condition. There was, however, no difference in the recognition accuracy (neutral and emotional) between the groups. In summary, our data suggest that REM-sleep deprivation was successful and that the resulting reduction of REM-sleep had no influence on memory consolidation whatsoever.

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Section: Methodsmentioning

confidence: 99%

Selective REM-Sleep Deprivation Does Not Diminish Emotional Memory Consolidation in Young Healthy Subjects

et al. 2014

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“…For measuring handedness in the present study, a very crude measure was applied, as the main focus of the study was the relationship between book preferences and dreaming. Future studies should use more sophisticated ways of assessing handedness; for overviews see Annett (2002), Beaton (2003), and Christman and Propper (2010). Also, as handedness is related to a host of other factors (Domellöf, Johansson, & Rönnqvist, 2011) that can affect brain functioning, such as preterm birth, a broad battery of cognitive tests would be desirable to characterize the samples of left-handers, right-handers, and persons with mixed/inconsistent-handedness.…”

Section: Discussionmentioning

confidence: 99%

“…In order to test the hypothesis put forward by Christman and Propper (2010), it would be interesting to correlate corpus callosum size and dream-recall frequency, expecting larger sizes to be related to higher dream recall. In view of the present finding, however, large sample sizes would be needed to test this small effect.…”

Section: Discussionmentioning

confidence: 99%

“…These authors hypothesized that dream recall (transferring the visual imagery into an oral or written report) is facilitated by greater hemispheric differentiation because the language centers have better access to the dream-associated activation of the same hemisphere-supported by findings showing that right and left hemispheres contribute equally to the subjective experience of dreaming (Antrobus, 1987). On the other hand, Christman and Propper (2010) showed that inconsistent handedness is associated with higher recall in comparison with consistent right-handedness or left-handedness. They argue that brains of persons with inconsistent handedness have a larger corpus callosum and, therefore, a better connection between the two hemispheres.…”

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confidence: 99%

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Handedness and dream-recall frequency.

Schredl¹,

Beaton²,

Henley-Einion³

et al. 2013

Dreaming

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The ability to recall a dream upon waking up in the morning has been linked to a broad variety of factors such as personality, creativity, sleep behavior, and cognitive function. As dreaming has been associated with the right hemisphere, it has been proposed that left-handed persons would have easier access to their dreams. However, previous empirical data support an association of dream-recall frequency with right-handedness. In the present sample of 1,375 participants, right-handedness and mixed/inconsistent handedness were associated with higher dream-recall frequency than were lefthanded persons (especially pronounced in the subgroup of adolescents), partly confirming previous findings. As handedness is related to other factors such as preterm birth, which can affect brain functioning, a broad battery of cognitive tests would be desirable to further characterize samples of lefthanders, right-handers and persons with inconsistent handedness.

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“…Although distinct states, anaesthesia and sleep share many traits and neural pathways , and sleep architecture has been shown to vary based on handedness with consistent right‐handers exhibiting increased time in rapid eye movement (REM) sleep and decreased time in non‐REM sleep . Several studies have investigated the relationship between handedness and sleep quantity or quality, with conflicting findings .…”

Section: Introductionmentioning

confidence: 99%

Impact of right‐handedness on anaesthetic sensitivity, intra‐operative awareness and postoperative mortality

et al. 2014

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SummaryAnatomical, neurological and behavioural research has suggested differences between the brains of right-and non-righthanded individuals, including differences in brain structure, electroencephalogram patterns, explicit memory and sleep architecture. Some studies have also found decreased longevity in left-handed individuals. We therefore aimed to determine whether handedness independently affects the relationship between volatile anaesthetic concentration and the bispectral index, the incidence of definite or possible intra-operative awareness with explicit recall, or postoperative mortality. We studied 5585 patients in this secondary analysis of data collected in a multicentre clinical trial. There were 4992 (89.4%) right-handed and 593 (10.6%) non-right-handed patients. Handedness was not associated with (a) an alteration in anaesthetic sensitivity in terms of the relationship between the bispectral index and volatile anaesthetic concentration (estimated effect on the regression relationship À0.52 parallel shift; 95% CI À1.27 to 0.23, p = 0.17); (b) the incidence of intra-operative awareness with 26/4992 (0.52%) right-handed vs 1/593 (0.17%) non-right-handed (difference = 0.35%; 95% CI À0.45 to 0.63%; p = 0.35); or (c) postoperative mortality rates (90-day relative risk for non-right-handedness 1.19, 95% CI 0.76-1.86; p = 0.45). Thus, no change in anaesthetic management is indicated for non-right-handed patients.

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Dreaming, Handedness, and Sleep Architecture: Interhemispheric Mechanisms

Cited by 7 publications

References 73 publications

Selective REM-Sleep Deprivation Does Not Diminish Emotional Memory Consolidation in Young Healthy Subjects

Selective REM-Sleep Deprivation Does Not Diminish Emotional Memory Consolidation in Young Healthy Subjects

Handedness and dream-recall frequency.

Impact of right‐handedness on anaesthetic sensitivity, intra‐operative awareness and postoperative mortality

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