Journal
BRAIN RESEARCH
Volume 1182, Issue -, Pages 73-81Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.brainres.2007.08.060
Keywords
p wave; PGO wave; hippocampal theta wave; memory; REM sleep; phase-locking
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Temporal relationships between hippocampal theta waves and pontine waves (P waves) during rapid-eye-movement (REM) sleep were investigated in rats. P waves were phase-locked to the positive theta peak. The phase relationships of P waves elicited by a tone Stimulus (PE waves) to hippocampal theta waves were also analyzed to qualitatively clarify the mechanism of phase-locking between these two phenomena. PE waves occurred at the positive theta peak, as seen for spontaneous P waves. This phase preference of P-E waves could be understood as that of the response probability to tone stimulus. These data suggest that the P-wave generator receives inputs that mimic theta waves. As hippocampal theta waves and P waves are known to be involved in learning and memory processes during REM sleep, the present studies could help to clarify these functions. (C) 2007 Elsevier B.V. All rights reserved.
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