Matches in SemOpenAlex for { <https://semopenalex.org/work/W2009920642> ?p ?o ?g. }
Showing items 1 to 58 of
58
with 100 items per page.
- W2009920642 endingPage "88" @default.
- W2009920642 startingPage "82" @default.
- W2009920642 abstract "In 25 subjects repeated examination of contingent negative variation (S1 − S2 = 1 sec) under relatively unconstrained experimental conditions (simple, monotonous task, long recording sessions with eyes closed) favorized drowsiness and falling asleep. These periods of low vigilance level, observed in 7 subjects, are characterized by: (1) a global reduction in spontaneous EEG, measured by a diminution in the alpha/theta + delta index (FFT on bipolar leads P3 − P4); (2) an inversion in alpha reactivity in the S1 − S2 interval, which, instead of diminishing, tends to augment ‘paradoxically’; and (3) an inversion in the polarity of the CNV, which can reach a positive value as high as +15 to +20 μV. These electrophysiological phenomena are not accompanied by significant modifications in reaction time. The results are interpreted as the translation of an active ‘internal inhibition’ process, induced by repetition of monotonic stimuli. They are compared with animal data obtained by Marczynski and Sherry (1972) and Skinner and Yingling (1977). Chez vingt-cinq sujets de contrôle, l'étude répétée de la variation contingente négative (VCN) (S1 − S2 = 1 sec) dans des conditions expérimentales peu contraignantes (tâche facile et monotone, longue séance d'enregistrement les yeux fermés) a favorisé l'apparition de phénomènes de somnolence et d'endormissement. Ces périodes d'hypo-vigilance, observées chez 7 sujets, se caractérisent par: (1) un ralentissement global de l'EEG spontané, mesuré par une diminution de l'indice alpha/thêta + delta (FFT pratiqué sur une dérivation bipolaire P3−P4); (2) une inversion de la réactivité du rythme alpha dans l'intervalle S1 − S2 qui au lieu de diminuer, tend à présenter une augmentation «paradoxale; (3) une inversion de polarité de la VCN qui peut atteindre des valeurs positives de +15 à + 20 μV. Ces phénomènes électrophysiologiques ne s'accompagnent pas de modifications importantes du temps de réaction. Ces résultats sont interprétés comme la traduction d'un processus actif d'«inhibition interne, induit par la répétition de stimulations monotones. Ils sont comparés aux données obtenues chez l'animal par Marczynski and Sherry (1972) et Skinner et Yingling (1977)." @default.
- W2009920642 created "2016-06-24" @default.
- W2009920642 creator A5021930228 @default.
- W2009920642 creator A5072794504 @default.
- W2009920642 creator A5088547996 @default.
- W2009920642 date "1981-09-01" @default.
- W2009920642 modified "2023-09-25" @default.
- W2009920642 title "Inversion de polarite de la variation contingente negative au cours d'etats d'endormissement" @default.
- W2009920642 cites W1966981962 @default.
- W2009920642 cites W1981247084 @default.
- W2009920642 cites W2037636926 @default.
- W2009920642 cites W2047883499 @default.
- W2009920642 cites W2061171222 @default.
- W2009920642 cites W2083597669 @default.
- W2009920642 cites W2087197661 @default.
- W2009920642 cites W2143450520 @default.
- W2009920642 doi "https://doi.org/10.1016/s0370-4475(81)80037-8" @default.
- W2009920642 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/7313260" @default.
- W2009920642 hasPublicationYear "1981" @default.
- W2009920642 type Work @default.
- W2009920642 sameAs 2009920642 @default.
- W2009920642 citedByCount "4" @default.
- W2009920642 crossrefType "journal-article" @default.
- W2009920642 hasAuthorship W2009920642A5021930228 @default.
- W2009920642 hasAuthorship W2009920642A5072794504 @default.
- W2009920642 hasAuthorship W2009920642A5088547996 @default.
- W2009920642 hasConcept C15744967 @default.
- W2009920642 hasConcept C169760540 @default.
- W2009920642 hasConcept C192769605 @default.
- W2009920642 hasConcept C197951375 @default.
- W2009920642 hasConcept C522805319 @default.
- W2009920642 hasConceptScore W2009920642C15744967 @default.
- W2009920642 hasConceptScore W2009920642C169760540 @default.
- W2009920642 hasConceptScore W2009920642C192769605 @default.
- W2009920642 hasConceptScore W2009920642C197951375 @default.
- W2009920642 hasConceptScore W2009920642C522805319 @default.
- W2009920642 hasIssue "1" @default.
- W2009920642 hasLocation W20099206421 @default.
- W2009920642 hasLocation W20099206422 @default.
- W2009920642 hasOpenAccess W2009920642 @default.
- W2009920642 hasPrimaryLocation W20099206421 @default.
- W2009920642 hasRelatedWork W1964140894 @default.
- W2009920642 hasRelatedWork W1993352813 @default.
- W2009920642 hasRelatedWork W2019624167 @default.
- W2009920642 hasRelatedWork W2037274297 @default.
- W2009920642 hasRelatedWork W2061148184 @default.
- W2009920642 hasRelatedWork W2064143629 @default.
- W2009920642 hasRelatedWork W2064565484 @default.
- W2009920642 hasRelatedWork W2112335377 @default.
- W2009920642 hasRelatedWork W2172700487 @default.
- W2009920642 hasRelatedWork W2292572296 @default.
- W2009920642 hasVolume "11" @default.
- W2009920642 isParatext "false" @default.
- W2009920642 isRetracted "false" @default.
- W2009920642 magId "2009920642" @default.
- W2009920642 workType "article" @default.