Premium
Synchronization between hippocampal theta waves and PGO waves during REM sleep
Author(s) -
Karashima Akihiro,
Nakamura Kazuhiro,
Watanabe Mika,
Sato Naoki,
Nakao Mitsuyuki,
Katayama Norihiro,
Yamamoto Mitsuaki
Publication year - 2001
Publication title -
psychiatry and clinical neurosciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.609
H-Index - 74
eISSN - 1440-1819
pISSN - 1323-1316
DOI - 10.1046/j.1440-1819.2001.00820.x
Subject(s) - theta rhythm , hippocampal formation , physics , synchronization (alternating current) , neuroscience , psychology , mathematics , topology (electrical circuits) , combinatorics
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.