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Different types of theta rhythmicity are induced by social and fearful stimuli in a network associated with social memory

Rhythmic activity in the theta range is thought to promote neuronal communication between brain regions. In this study, we performed chronic telemetric recordings in socially behaving rats to monitor electrophysiological activity in limbic brain regions linked to social behavior. Social encounters w...

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Published in:eLife 2015-02, Vol.4
Main Authors: Tendler, Alex, Wagner, Shlomo
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description Rhythmic activity in the theta range is thought to promote neuronal communication between brain regions. In this study, we performed chronic telemetric recordings in socially behaving rats to monitor electrophysiological activity in limbic brain regions linked to social behavior. Social encounters were associated with increased rhythmicity in the high theta range (7-10 Hz) that was proportional to the stimulus degree of novelty. This modulation of theta rhythmicity, which was specific for social stimuli, appeared to reflect a brain-state of social arousal. In contrast, the same network responded to a fearful stimulus by enhancement of rhythmicity in the low theta range (3-7 Hz). Moreover, theta rhythmicity showed different pattern of coherence between the distinct brain regions in response to social and fearful stimuli. We suggest that the two types of stimuli induce distinct arousal states that elicit different patterns of theta rhythmicity, which cause the same brain areas to communicate in different modes.
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subjects Animals
Arousal
Bands
Brain
Brain - physiology
Communication
Data analysis
Fear
fear conditioning
Investigations
medial amygdala
Memory
Neuroscience
Neurosciences
olfactory system
Rats
Rodents
Social Behavior
Social organization
social recognition memory
Theta Rhythm
theta rhythmicity
Theta rhythms
title Different types of theta rhythmicity are induced by social and fearful stimuli in a network associated with social memory
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