Slow eye movements and transitional periods of EEG sleep stages during daytime sleep.

Hiroshige, Yoshiharu; Miyata, Yô

doi:10.4992/jjpsy.60.378

Cited by 13 publications

(4 citation statements)

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“…There is increasing agreement that slow eye movement (SEM) serves as a reliable alternative for assessing drowsiness (Hori, 1982;Kojima et al, 1981;Ogilvie & Wilkinson, 1984;Ogilvie, McDonagh, & Stone, 1988;Santamaria & Chiappa, 1987). One of the present authors has found a significant linkage of SEM with lower levels of arousal, such as sleepiness, with the transitional period of sleep stage, and with difficulty in falling asleep (Hiroshige, 1987(Hiroshige, , 1992Hiroshige & Miyata, 1990). Moreover, the stage defined by the EEG and electro-oculogram (EOG) (EEG-EOG stage) is helpful for the recognition of a drowsy state even in EEG-defined wakefulness.…”

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confidence: 69%

Hemispheric Asymmetry and Regional Differences in Electroencephalographic Alpha Activity at the Wake‐Sleep Transition

Hiroshige

Дорохов

1997

Jpn Psychol Res

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Electroencephalographic (EEG) alpha activity at the wake‐sleep transition was studied in six right‐handed adults in terms of hemispheric asymmetry and regional differences. Twelve‐channel EEGs with linked mastoid references were recorded together with horizontal and vertical electro‐oculograms (EOGs). Two types of alpha coefficient were obtained every 5.12 s by computing the relative proportion of right vs. left alpha band power and of anterior vs. posterior alpha band power. Four stages were scored using EEG sleep patterns (theta waves, vertex sharp waves, spindles, and K complex) and slow eye movement (SEM): stage W had neither EEG sleep patterns nor SEM; stage D1 had SEM and no EEG sleep patterns; stage D2 had theta waves or vertex sharp waves and SEM; stage S had spindles or K complex without SEM. It was found that the two types of alpha coefficient changed as a function of EEG‐EOG stage and were correlated. Right‐decreased and anterior‐shifted alpha activities were manifest at stages D2 and S. Drowsiness was considered to be a heterogeneous state, exhibiting different spatial changes in alpha activity between stages D1 and D2.

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confidence: 69%

Hemispheric Asymmetry and Regional Differences in Electroencephalographic Alpha Activity at the Wake‐Sleep Transition

Hiroshige

Дорохов

1997

Jpn Psychol Res

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“…34 The number of 15-second epochs in which slow eye movements occurred during the 2 minutes of the visual detection task was counted. Eye movements with amplitudes greater than 50 μV and durations greater than 1 second 35 were judged as slow eye movements.…”

Section: Physiologic Measuresmentioning

confidence: 99%

Recuperative Power of a Short Daytime Nap With or Without Stage 2 Sleep

Hayashi

Motoyoshi

Hori

2005

Sleep

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The recuperative effect of a nap of less than 30 minutes has been confirmed. Such naps consist mainly of stages 1 and 2 sleep. The present study examined whether sleep stage 1 or 2 contributed to the recuperative effect of a short nap. Design: Repeated-measurement within-subject design. After sleep was restricted to 1.5 hours less than their usual nocturnal sleep, participants took a rest (No-nap condition) or a nap at 2:00 PM. In the nap condition, they were awakened after 5 minutes of stage 1 sleep (S1-nap condition) or 3 minutes after stage 2 sleep appeared (S2-nap condition). Setting: University sleep laboratory. Participants: Ten healthy university students (aged 19 to 24 years). Measurements: Subjective mood, performance on visual detection and symbol-digit substitution tasks, and the number of slow eye movements during a performance task were measured before and after the nap or rest. Results: In the No-nap condition, subjective mood and performance deteriorated, and Slow eye movements increased during mid-afternoon, suggesting that the post-lunch dip occurred. In contrast, subjective alertness and performance improved and slow eye movements rarely occurred in the S2-nap condition. Although subjective sleepiness and fatigue improved, performance deteriorated and slow eye movements increased in the S1-nap condition. Conclusion: A daytime short nap containing 3 minutes of stage 2 sleep has recuperative effects, whereas these effects are limited following only stage 1 sleep.

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“…, 1995; Torsvall and Akerstedt, 1988), theta EEG power spectra (Akerstedt and Gillberg, 1990; Bericchi et al. , 1995; Torsvall and Akerstedt, 1988), subjective estimates of sleepiness (Akerstedt and Gillberg, 1990; Hiroshige and Miyata, 1990; Torsvall and Akerstedt, 1988), and behavioral responses (Torsvall and Akerstedt, 1988). When the relation between SEMs and EEG changes was assessed in subjects with eyes closed, low or moderate correlations of SEM activity, respectively with EEG sleep stages and with auditory reaction times in a behavioral task performed during the sleep onset period, were reported (Ogilvie et al.…”

Section: Introductionmentioning

confidence: 99%

Oculomotor changes are associated to daytime sleepiness in the multiple sleep latency test

Gennaro

Devoto

Lucidi

et al. 2005

Journal of Sleep Research

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Slow eye movements and transitional periods of EEG sleep stages during daytime sleep.

Cited by 13 publications

References 0 publications

Hemispheric Asymmetry and Regional Differences in Electroencephalographic Alpha Activity at the Wake‐Sleep Transition

Hemispheric Asymmetry and Regional Differences in Electroencephalographic Alpha Activity at the Wake‐Sleep Transition

Recuperative Power of a Short Daytime Nap With or Without Stage 2 Sleep

Oculomotor changes are associated to daytime sleepiness in the multiple sleep latency test

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