Paradoxical Sleep is Characterized by Uncoupled Gamma Activity Between Frontal and Perceptual Cortical Regions

Pérez-Garci, Enrique; Río-Portilla, Yolanda del; Guevara, Miguel Ángel; Arce, Consuelo; Corsi-Cabrera, María

doi:10.1093/sleep/24.1.118

Cited by 66 publications

(54 citation statements)

References 42 publications

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“…During REM sleep as opposed to waking, the frontal cortex seems to be disconnected from other cortical areas, particularly perceptual areas, as the gamma rhythm becomes uncoupled over cortex areas (Perez-Garci et al 2001;Corsi-Cabrera et al 2003). Our observations which aroused from a different approach compared to Perez-Garci's and Corsi-Cabrera's studies and focused on the (1-18) Hz frequency band, complements their results and provides additional support to the explanation why we can become conscious during REM sleep.…”

Section: Discussionsupporting

confidence: 78%

Characterizing Dynamic Functional Connectivity Across Sleep Stages from EEG

et al. 2008

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Following a nonlinear dynamics approach, we investigated the emergence of functional clusters which are related with spontaneous brain activity during sleep. Based on multichannel EEG traces from 10 healthy subjects, we compared the functional connectivity across different sleep stages. Our exploration commences with the conjecture of a small-world patterning, present in the scalp topography of the measured electrical activity. The existence of such a communication pattern is first confirmed for our data and then precisely determined by means of two distinct measures of non-linear interdependence between time-series. A graph encapsulating the small-world network structure along with the relative interdependence strength is formed for each sleep stage and subsequently fed to a suitable clustering procedure. Finally the delineated graph components are comparatively presented for all stages revealing novel attributes of sleep architecture. Our results suggest a pivotal role for the functional coupling during the different stages and indicate interesting dynamic characteristics like its variable hemispheric asymmetry and the isolation between anterior and posterior cortical areas during REM.

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Section: Discussionsupporting

confidence: 78%

Characterizing Dynamic Functional Connectivity Across Sleep Stages from EEG

et al. 2008

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“…Additionally, electrophysiological data revealed that the gamma rhythm is synchronized in the cortical regions during wakefulness, whereas it is suppressed between visual areas, the frontal cortex and the prefrontal cortex [32] as well as between the hippocampus and the cerebral cortex during REM sleep [33]. The disconnection of the gamma rhythm between central structures of the brain in REM sleep in non-clinical individuals corresponds to the disturbances in cortical connectivity typical for schizophrenia [6].…”

Section: Neurobiological Similarities Between Schizophrenia and The Rmentioning

confidence: 99%

“…Once lucid dreaming is left out of the analysis we can see that what characterizes both states is not only a loss of autonomy in relation to mental Archives of Psychiatry and Psychotherapy, 2013; 2 : [29][30][31][32][33][34][35] content, but also a lack of insight [7]. These are some of the defining conditions of dreams [7].…”

Section: Common Phenomenological Features Of Schizophrenia and Dreamingmentioning

confidence: 99%

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What links schizophrenia and dreaming? Common phenomenological and neurobiological features of schizophrenia and REM sleep.

Skrzypińska¹,

Szmigielska²

2013

Arch Psych Psych

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SummaryAim. The aim of this theoretical study is to present common phenomenological and neurobiological features of schizophrenia and REM sleep. Results. A review of professional literature was conducted in order to synthesize current findings about associations between schizophrenia and REM sleep. Many researches reveal that both states share some common phenomenological and neurobiological features. Autism, lack of insight and a loss of autonomy in relation to mental content are just some of the characteristics that occur on a phenomenological level in both dreams during REM sleep (lucid dreaming excluded) and schizophrenia. Data from experimental conditions revealed that the waking mentation of patients suffering from schizophrenia has a similar degree of formal cognitive bizarreness as dream narratives obtained from both non-clinical and clinical populations. On the other hand, some common neurobiological features of the REM sleep stage and schizophrenia are: lack of central inhibitory processes, intracerebral disconnections, dysfunction of the dorsolateral prefrontal cortex or nucleus accumbens and disturbed responsiveness. Moreover, there is similar activation of dopamine, acetylcholine, noradrenaline, serotonin and glutamate in both states. Conclusions. Common phenomenological and neurobiological characteristics of these two states suggest that data about REM sleep could help introduce a useful experimental model of schizophrenia. schizophrenia / reM sleep / dreaming

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“…L'atonie posturale est le propre de cet état de sommeil chez l'animal et l'homme. Les points communs sont légion entre éveil et sommeil paradoxal : EEG, nombre de potentiels d'action, même activité gamma avec cette différence que ce rythme se désorganise dans les aires corticales pendant le sommeil paradoxal où il apparaît découplé [13], comme le témoin d'une perte de coordination intracérébrale qui a sûrement partie liée avec l'incohérence du contenu onirique. C'est à un dérèglement de même nature que se rattache la discordance psychique de la schizophrénie [14].…”

Section: Sommeil Paradoxalunclassified

Rêve et schizophrénie : Un même support neurobiologique ?

Gottesmann

2006

Med Sci (Paris)

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Paradoxical Sleep is Characterized by Uncoupled Gamma Activity Between Frontal and Perceptual Cortical Regions

Cited by 66 publications

References 42 publications

Characterizing Dynamic Functional Connectivity Across Sleep Stages from EEG

Characterizing Dynamic Functional Connectivity Across Sleep Stages from EEG

What links schizophrenia and dreaming? Common phenomenological and neurobiological features of schizophrenia and REM sleep.

Rêve et schizophrénie : Un même support neurobiologique ?

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