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Novel acoustic stimuli can alter locomotor speed to hippocampal theta relationship

Novel acoustic stimuli can alter locomotor speed to hippocampal theta relationship Hippocampal theta (6–12 Hz) plays a critical role in synchronizing the discharge of action potentials, ultimately orchestrating individual neurons into large‐scale ensembles. Alterations in theta dynamics may reflect variations in sensorimotor integration, the flow of sensory input, and/or cognitive processing. Previously we have investigated septotemporal variation in the locomotor speed to theta amplitude relationship as well as how that relationship is systematically altered as a function of novel, physical space. In the present study, we ask, beyond physical space, whether persistent and passive sound delivery can alter septal theta local field potential rhythm dynamics. Results indicate pronounced alterations in the slope of the speed to theta amplitude relationship as a function of sound presentation and location. Further, this reduction in slope habituates across days. The current findings highlight that moment‐to‐moment alterations in theta amplitude is a rich dynamic index that is quantitatively related to both alterations in motor behavior and sensory experience. The implications of these phenomena are discussed with respect to emergent cognitive functions subserved by hippocampal circuits. © 2014 Wiley Periodicals, Inc. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Hippocampus Wiley

Novel acoustic stimuli can alter locomotor speed to hippocampal theta relationship

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References (51)

Publisher
Wiley
Copyright
"© 2014 Wiley Periodicals, Inc."
ISSN
1050-9631
eISSN
1098-1063
DOI
10.1002/hipo.22308
pmid
24866396
Publisher site
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Abstract

Hippocampal theta (6–12 Hz) plays a critical role in synchronizing the discharge of action potentials, ultimately orchestrating individual neurons into large‐scale ensembles. Alterations in theta dynamics may reflect variations in sensorimotor integration, the flow of sensory input, and/or cognitive processing. Previously we have investigated septotemporal variation in the locomotor speed to theta amplitude relationship as well as how that relationship is systematically altered as a function of novel, physical space. In the present study, we ask, beyond physical space, whether persistent and passive sound delivery can alter septal theta local field potential rhythm dynamics. Results indicate pronounced alterations in the slope of the speed to theta amplitude relationship as a function of sound presentation and location. Further, this reduction in slope habituates across days. The current findings highlight that moment‐to‐moment alterations in theta amplitude is a rich dynamic index that is quantitatively related to both alterations in motor behavior and sensory experience. The implications of these phenomena are discussed with respect to emergent cognitive functions subserved by hippocampal circuits. © 2014 Wiley Periodicals, Inc.

Journal

Hippocampus – Wiley

Published: Sep 1, 2014

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