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- Title
Synchronization between hippocampal theta waves and PGO waves during REM sleep.
- Authors
Karashima, Akihiro; Nakamura, Kazuhiro; Watanabe, Mika; Sato, Naoki; Nakao, Mitsuyuki; Katayama, Norihiro; Yamamoto, Mitsuaki
- Abstract
Abstract We investigated the temporal relationship between hippocampal theta waves (referred to as ‘theta waves’) and ponto-geniculo-occipital (PGO) waves in cats. We measured the time intervals between an occurrence of a PGO wave and the prior and posterior adjacent positive peaks of the theta wave. The unimodal distributions of these intervals suggested a close temporal relationship between PGO and theta waves (i.e. synchronization). In addition, the period of a theta wave during which a PGO wave occurred was not statistically different from that without a PGO wave. This result suggests that the synchronization found here is characterized by phase-locking rather than phase-resetting. Common mechanisms are suggested to underlie the generation of PGO and theta waves.
- Subjects
THETA rhythm; HIPPOCAMPUS (Brain); SLEEP; SYNCHRONIZATION
- Publication
Psychiatry & Clinical Neurosciences, 2001, Vol 55, Issue 3, p189
- ISSN
1323-1316
- Publication type
Article
- DOI
10.1046/j.1440-1819.2001.00820.x