ArticleBehavioral correlates of hippocampal type 2 theta in the rat☆
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2020, International Journal of PsychophysiologyCitation Excerpt :Type 2 RSA has a frequency between 4 and 7 Hz. It is observed in rabbits, cats, and guinea pigs but rarely in rats (Robinson, 1980; Sainsbury et al., 1987). It is blocked by Ach antagonists, and is atropine-sensitive.
Hippocampal Interneuronal α7 nAChRs Modulate Theta Oscillations in Freely Moving Mice
2020, Cell ReportsCitation Excerpt :Two neurotransmitter receptor classes—muscarinic ACh receptors (mAChRs) and the NMDA subtype of glutamate receptors—are strongly implicated in theta generation. The mAChRs are the major mediator of type-II theta oscillations, which have a frequency of 4–9 Hz and often occur during alert immobility or under urethane anesthesia in rodents (Buzsáki, 2002; Kramis et al., 1975; Sainsbury et al., 1987). Septal neurons (Lawson and Bland, 1993; Monmaur et al., 1993; Monmaur and Breton, 1991), especially parvalbumin-positive interneurons (Dannenberg et al., 2015), are critical in type-II theta generation.
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This research was supported by a grant (A0361) from the Natural Sciences and Engineering Council of Canada.