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  Anterior Thalamic High Frequency Band Activity Is Coupled with Theta Oscillations at Rest

Sweeney-Reed, C., Zaehle, T., Voges, J., Schmitt, F., Buentjen, L., Borchardt, V., et al. (2017). Anterior Thalamic High Frequency Band Activity Is Coupled with Theta Oscillations at Rest. Frontiers in Human Neuroscience, 11: 358, pp. 1-13. doi:10.3389/fnhum.2017.00358.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-C2D5-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-F872-8
Genre: Journal Article

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Sweeney-Reed, CM, Author
Zaehle, T, Author
Voges, J, Author
Schmitt, FC, Author
Buentjen, L, Author
Borchardt, V, Author
Walter, M1, Author              
Hinrichs, H, Author
Heinze, H-J, Author
Rugg, MD, Author
Knight, RT, Author
Affiliations:
1Department of Psychiatry, Eberhard Karls University, Tübingen, Germany, ou_persistent22              

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 Abstract: Cross-frequency coupling (CFC) between slow and fast brain rhythms, in the form of phase–amplitude coupling (PAC), is proposed to enable the coordination of neural oscillatory activity required for cognitive processing. PAC has been identified in the neocortex and mesial temporal regions, varying according to the cognitive task being performed and also at rest. PAC has also been observed in the anterior thalamic nucleus (ATN) during memory processing. The thalamus is active during the resting state and has been proposed to be involved in switching between task-free cognitive states such as rest, in which attention is internally-focused, and externally-focused cognitive states, in which an individual engages with environmental stimuli. It is unknown whether PAC is an ongoing phenomenon during the resting state in the ATN, which is modulated during different cognitive states, or whether it only arises during the performance of specific tasks. We analyzed electrophysiological recordings of ATN activity during rest from seven patients who received thalamic electrodes implanted for treatment of pharmacoresistant focal epilepsy. PAC was identified between theta (4–6 Hz) phase and high frequency band (80–150 Hz) amplitude during rest in all seven patients, which diminished during engagement in tasks involving an external focus of attention. The findings are consistent with the proposal that theta–gamma coupling in the ATN is an ongoing phenomenon, which is modulated by task performance.

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 Dates: 2017-07
 Publication Status: Published in print
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 Identifiers: DOI: 10.3389/fnhum.2017.00358
BibTex Citekey: SweeneyReedZVSBBWHHRK2017_2
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Title: Frontiers in Human Neuroscience
Source Genre: Journal
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Pages: - Volume / Issue: 11 Sequence Number: 358 Start / End Page: 1 - 13 Identifier: -