The occurrence of high frequency, gamma EEG activity (30-60 Hz) was bands and in investigated by spectral analysis in relationship to other frequency association with the natural sleep-waking cycle and spontaneous behaviors of the rat. High frequency, gamma waves are present and occur intermittently on the filtered and unfiltered EEG across the sleep-waking cycle. Gamma activity is distinctive from other high frequency bands, in that the amplitude varies systematically in association with (1) state, having the highest amplitude in Waking and Paradoxical Sleep (PS) as compared to Slow Wave Sleep (SWS) and, (2) behavior, having the highest amplitude in attentive and active waking behaviors and 'active' sleep with twitches indicative of PS, as compared to quiet waking and 'quiet' sleep. Coherence in gamma activity also varies as a function of state-behavior, having the highest values in Waking moving and PS. Gamma activity varies positively with theta and inversely with delta activity over the sleep-waking cycle. Gamma activity is thus shown to reflect the degree of behavioral and cortical arousal.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.23918 |
| Date | January 1996 |
| Creators | Maloney, Karen J. |
| Contributors | Jones, B. E. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Neurology and Neurosurgery.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001494919, proquestno: MM12234, Theses scanned by UMI/ProQuest. |
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