Les phases transitionnelles du sommeil : Effet de facteurs psychologiques et psychopathologiques sur l'organisation du premier cycle

Barros-Ferreira, M de

doi:10.1016/s0370-4475(73)80032-2

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“…The former include the hyposomnia [12], the slowness in transition phase and the in stability of cortical electrogenesis, which is called 'sleep ataxia' by Marchesi et al [23], New data concern: (1) the abnormal sleep organization in two BRs, one of them with small cerebellar atrophy, with both qualita tive and quantitative analogies to FCA sub jects; (2) the sleep distribution in stages in cluding the intermediate phase; this was greater in FCA cases and in BRs with patho logical sleep (in which ranged from 7.2 to 10.4% and 6.4 to 6.7%, respectively) than in BRs with normal sleep (2.1-3.4%); (3) the nature of the intermediate sleep phase in pathological and normal sleep; it corre sponds to stage II ambigu of Barros-Ferreira [15] in the former and to stage I ambigu of Barros-Ferreira [15] and to stage REM am bigu of Snyder [16] in the latter.…”

Section: Discussionmentioning

confidence: 89%

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Spindle and EEG Sleep Alterations in Subjects Affected by Cortical Cerebellar Atrophy

1987

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All-night polygraphic records (EEG, EOG and ECG) were performed on 9 subjects. Four of them were affected by Familiar Cerebellar Atrophy (FCA) whereas the others were their blood relatives without clinical signs of cerebellar deficit. In the former FCA was diagnosed clinically and the cerebellar atrophy was confirmed by computer tomography (CT). In all the latter except one who showed slight cerebellar atrophy, the CTs were negative. The EEG sleep records of the FCA patients were characterized by slowly changing phases between synchronized and desynchronized sleep, instability of the synchronized sleep with frequent modifications of EEG activity, subnormal measurement of both REM and slow-wave sleep and presence of spindles in REM sleep (only in 2 patients). The spindle activity was reduced in two FCA subjects. The electroencephalographic sleep records of two BRs, one of which with small cerebellar atrophy, showed qualitative and quantitative alterations similar to those of FCA patients, even if marked to a lesser degree. Increased spindle densities were present in the same BRs who showed sleep abnormalities. The EEG alterations observed in the two BR subjects could show small cerebellar injuries which would be insufficient to induce clinical signs.

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Section: Discussionmentioning

confidence: 89%

“…The intermediary phase between syn chronized (SS) and desynchronized sleep (DS) was considered. This was characterized as an ambiguous phase of sleep showing overlap of DS and SS for both morphologic characteristics of EEG and concomitant polygraphic features [15,16]. It was subdivided [17] into two stages.…”

Section: Methodsmentioning

confidence: 99%