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Characterization of the Neural Corre...

Hsieh, Liang-Tien.

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Characterization of the Neural Correlates Associated with Temporal Sequence Processing in the Human Brain.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Characterization of the Neural Correlates Associated with Temporal Sequence Processing in the Human Brain./
Author:	Hsieh, Liang-Tien.
Description:	179 p.
Notes:	Source: Dissertation Abstracts International, Volume: 76-07(E), Section: B.
Contained By:	Dissertation Abstracts International76-07B(E).
Subject:	Neurosciences. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3685236
ISBN:	9781321608953

Characterization of the Neural Correlates Associated with Temporal Sequence Processing in the Human Brain.
Hsieh, Liang-Tien.

Characterization of the Neural Correlates Associated with Temporal Sequence Processing in the Human Brain. - 179 p.

Source: Dissertation Abstracts International, Volume: 76-07(E), Section: B.

Thesis (Ph.D.)--University of California, Davis, 2014.

One key feature of human episodic memory is our ability to engage in "mental time travel" to the past. Despite the consensus that temporal organization is a defining feature of human episodic memory, the neural mechanisms that underlie this ability remain largely unexplored. The present work aims to examine the neural underpinnings that support memory for temporal information in humans; using different approaches (i.e., scalp EEG and functional MRI) that each examines a specific aspect of the neural mechanisms associated with such ability. Chapter 1 of this dissertation presents an overview of this topic. A comprehensive literature review suggesting a role for low-frequency theta oscillations (4-8 Hz) in working memory and episodic memory encoding and retrieval processes is presented in Chapter 2. Chapter 3 presents findings from a scalp-EEG study, demonstrating that theta oscillations over frontal regions are particularly associated with the maintenance of temporal order, relative to item, information in working memory. To further delineate the neural substrates that support memory for temporal sequences, Chapters 4 and 5 present studies using functional MRI, along with multi-voxel pattern analysis techniques, to examine the contribution of distinct brain regions during retrieval of object sequences. Results in Chapter 4 demonstrate that hippocampal activity patterns represent a temporal signal that integrates object information, whereas activity patterns in the parahippocampal and perirhinal cortex are sensitive to temporal position and object information, respectively. Extending the findings in Chapter 4, Chapter 5 focuses on the involvement of the cortical "recollection network" that includes the medial prefrontal cortex, retrosplenial cortex, and angular gyrus during object sequence retrieval. The results clearly show that core regions of the recollection network schematically codes information about temporal positions of object sequences, irrespective of individual object information. The present work thus highlights the role of theta oscillations in retaining temporal order information in working memory, and further characterizes how brain regions that have been implicated in memory functions support memory for time.

ISBN: 9781321608953Subjects--Topical Terms:

588700
Neurosciences.

Characterization of the Neural Correlates Associated with Temporal Sequence Processing in the Human Brain.
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245 1 0 $a Characterization of the Neural Correlates Associated with Temporal Sequence Processing in the Human Brain.
300 $a 179 p.
500 $a Source: Dissertation Abstracts International, Volume: 76-07(E), Section: B.
500 $a Adviser: Charan Ranganath.
502 $a Thesis (Ph.D.)--University of California, Davis, 2014.
520 $a One key feature of human episodic memory is our ability to engage in "mental time travel" to the past. Despite the consensus that temporal organization is a defining feature of human episodic memory, the neural mechanisms that underlie this ability remain largely unexplored. The present work aims to examine the neural underpinnings that support memory for temporal information in humans; using different approaches (i.e., scalp EEG and functional MRI) that each examines a specific aspect of the neural mechanisms associated with such ability. Chapter 1 of this dissertation presents an overview of this topic. A comprehensive literature review suggesting a role for low-frequency theta oscillations (4-8 Hz) in working memory and episodic memory encoding and retrieval processes is presented in Chapter 2. Chapter 3 presents findings from a scalp-EEG study, demonstrating that theta oscillations over frontal regions are particularly associated with the maintenance of temporal order, relative to item, information in working memory. To further delineate the neural substrates that support memory for temporal sequences, Chapters 4 and 5 present studies using functional MRI, along with multi-voxel pattern analysis techniques, to examine the contribution of distinct brain regions during retrieval of object sequences. Results in Chapter 4 demonstrate that hippocampal activity patterns represent a temporal signal that integrates object information, whereas activity patterns in the parahippocampal and perirhinal cortex are sensitive to temporal position and object information, respectively. Extending the findings in Chapter 4, Chapter 5 focuses on the involvement of the cortical "recollection network" that includes the medial prefrontal cortex, retrosplenial cortex, and angular gyrus during object sequence retrieval. The results clearly show that core regions of the recollection network schematically codes information about temporal positions of object sequences, irrespective of individual object information. The present work thus highlights the role of theta oscillations in retaining temporal order information in working memory, and further characterizes how brain regions that have been implicated in memory functions support memory for time.
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