Sleep Spindles Characteristics in Insomnia Sufferers and Their Relationship with Sleep Misperception
Cortical hyperarousal is higher in insomnia sufferers (INS) than in good sleepers (GS) and could be related to an alteration in sleep protection mechanisms, like reduced density or altered characteristics in sleep spindles. The deficient sleep protection mechanisms might in turn enhance underestimat...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Neural Plasticity |
| Online Access: | http://dx.doi.org/10.1155/2016/6413473 |
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| author | Marie-Pier Normand Patrick St-Hilaire Célyne H. Bastien |
| author_facet | Marie-Pier Normand Patrick St-Hilaire Célyne H. Bastien |
| author_sort | Marie-Pier Normand |
| collection | DOAJ |
| description | Cortical hyperarousal is higher in insomnia sufferers (INS) than in good sleepers (GS) and could be related to an alteration in sleep protection mechanisms, like reduced density or altered characteristics in sleep spindles. The deficient sleep protection mechanisms might in turn enhance underestimation of sleep. This study’s objective was to document sleep spindles characteristics in INS compared with GS and to investigate their potential role in sleep consolidation and misperception. Seventeen individuals with paradoxical insomnia (PARA-I), 24 individuals with psychophysiological insomnia (PSY-I), and 29 GS completed four consecutive polysomnographic nights in laboratory. Sleep spindles were detected automatically during stage 2 and SWS (3-4) on night 3. Number, density, duration, frequency, and amplitude of sleep spindles were calculated. A misperception index was used to determine the degree of discrepancy between subjective and objective total sleep times. Kruskal-Wallis H tests and post hoc tests revealed that PARA-I had significantly shorter sleep spindles than GS but that PSY-I and GS did not differ on spindles length. A standard multiple regression model revealed that neither sleep spindles characteristics nor objective sleep measures were predictive of sleep misperception. A longer duration of spindles could reflect a higher gating process but this hypothesis still needs to be confirmed in replication studies. |
| format | Article |
| id | doaj-art-e44303f886c44194bf85d3e54988fe03 |
| institution | Kabale University |
| issn | 2090-5904 1687-5443 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Neural Plasticity |
| spelling | doaj-art-e44303f886c44194bf85d3e54988fe032025-02-03T01:32:04ZengWileyNeural Plasticity2090-59041687-54432016-01-01201610.1155/2016/64134736413473Sleep Spindles Characteristics in Insomnia Sufferers and Their Relationship with Sleep MisperceptionMarie-Pier Normand0Patrick St-Hilaire1Célyne H. Bastien2École de Psychologie, Université Laval, Québec, QC, G1V 0A6, CanadaÉcole de Psychologie, Université Laval, Québec, QC, G1V 0A6, CanadaÉcole de Psychologie, Université Laval, Québec, QC, G1V 0A6, CanadaCortical hyperarousal is higher in insomnia sufferers (INS) than in good sleepers (GS) and could be related to an alteration in sleep protection mechanisms, like reduced density or altered characteristics in sleep spindles. The deficient sleep protection mechanisms might in turn enhance underestimation of sleep. This study’s objective was to document sleep spindles characteristics in INS compared with GS and to investigate their potential role in sleep consolidation and misperception. Seventeen individuals with paradoxical insomnia (PARA-I), 24 individuals with psychophysiological insomnia (PSY-I), and 29 GS completed four consecutive polysomnographic nights in laboratory. Sleep spindles were detected automatically during stage 2 and SWS (3-4) on night 3. Number, density, duration, frequency, and amplitude of sleep spindles were calculated. A misperception index was used to determine the degree of discrepancy between subjective and objective total sleep times. Kruskal-Wallis H tests and post hoc tests revealed that PARA-I had significantly shorter sleep spindles than GS but that PSY-I and GS did not differ on spindles length. A standard multiple regression model revealed that neither sleep spindles characteristics nor objective sleep measures were predictive of sleep misperception. A longer duration of spindles could reflect a higher gating process but this hypothesis still needs to be confirmed in replication studies.http://dx.doi.org/10.1155/2016/6413473 |
| spellingShingle | Marie-Pier Normand Patrick St-Hilaire Célyne H. Bastien Sleep Spindles Characteristics in Insomnia Sufferers and Their Relationship with Sleep Misperception Neural Plasticity |
| title | Sleep Spindles Characteristics in Insomnia Sufferers and Their Relationship with Sleep Misperception |
| title_full | Sleep Spindles Characteristics in Insomnia Sufferers and Their Relationship with Sleep Misperception |
| title_fullStr | Sleep Spindles Characteristics in Insomnia Sufferers and Their Relationship with Sleep Misperception |
| title_full_unstemmed | Sleep Spindles Characteristics in Insomnia Sufferers and Their Relationship with Sleep Misperception |
| title_short | Sleep Spindles Characteristics in Insomnia Sufferers and Their Relationship with Sleep Misperception |
| title_sort | sleep spindles characteristics in insomnia sufferers and their relationship with sleep misperception |
| url | http://dx.doi.org/10.1155/2016/6413473 |
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