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Multielectrode neurophysiology of at...

Johnson, Jennie Louise.

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Multielectrode neurophysiology of attention: The role of gamma oscillations in stimulus selection.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Multielectrode neurophysiology of attention: The role of gamma oscillations in stimulus selection./
作者:	Johnson, Jennie Louise.
面頁冊數:	365 p.
附註:	Source: Dissertation Abstracts International, Volume: 64-09, Section: B, page: 4219.
Contained By:	Dissertation Abstracts International64-09B.
標題:	Psychology, Psychobiology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3105884
ISBN:	0496534513

Multielectrode neurophysiology of attention: The role of gamma oscillations in stimulus selection.
Johnson, Jennie Louise.

Multielectrode neurophysiology of attention: The role of gamma oscillations in stimulus selection. - 365 p.

Source: Dissertation Abstracts International, Volume: 64-09, Section: B, page: 4219.

Thesis (Ph.D.)--New York University, 2003.

Gamma oscillations have long been associated with states of attention and arousal, but their role in selective attention remains unclear. To date, most neurophysiological studies of attention fail to completely describe the role of gamma oscillations in attention because they are limited to the visual modality or are unable to simultaneously record multiple neuronal ensembles in the behaving subject.

ISBN: 0496534513Subjects--Topical Terms:

1017821
Psychology, Psychobiology.

Multielectrode neurophysiology of attention: The role of gamma oscillations in stimulus selection.
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100 1 $a Johnson, Jennie Louise. $3 1907230
245 1 0 $a Multielectrode neurophysiology of attention: The role of gamma oscillations in stimulus selection.
300 $a 365 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-09, Section: B, page: 4219.
500 $a Adviser: John P. Welsh.
502 $a Thesis (Ph.D.)--New York University, 2003.
520 $a Gamma oscillations have long been associated with states of attention and arousal, but their role in selective attention remains unclear. To date, most neurophysiological studies of attention fail to completely describe the role of gamma oscillations in attention because they are limited to the visual modality or are unable to simultaneously record multiple neuronal ensembles in the behaving subject.
520 $a The goal of this thesis was to determine the role that coherent, gamma band oscillations within primary sensory cortices play in attending to combinations of sensory events. First, a novel behavioral paradigm for selective attention in the rat was designed which was quick and reliable, examined selective attention to both visual and whisker-pad stimulation, and had internal controls to compare states of attention+sensation to sensation-alone. Second, multisite multielectrode arrays were used to simultaneously record local field potentials (LFPs) in primary visual and whisker somatosensory cortices during performance of the behavioral paradigm. Selective attention to a stimulus significantly augmented gamma (60--90 Hz) activity in lower layers of the appropriate primary sensory cortex. This augmentation occurred during the P300 component of the evoked response potential (ERP), and occurred regardless of the presence of a noise cue or motor response. Finally, a carrier system was designed which independently manipulated multiple microelectrodes to simultaneously record LFPs and putative inhibitory interneuron populations (thin-spiking neurons, or TSNs). These studies found that the spiking activity of TSN ensembles was phase-locked to the positivity of P300 gamma activity when a stimulus was selectively attended, but no pacemaker activity of single units was observed.
520 $a This thesis found a critical role for gamma (60--90 Hz) oscillations in a novel model of selective attention in the rat. Results demonstrate an early cortical locus of selective attention in two primary sensory cortices on a relatively late time scale appropriate to outgoing sensory processing. This work suggests that selective attention acts to augment gamma oscillations in lower layers of primary sensory cortices by facilitating phase-locked firing among populations of inhibitory interneurons. These findings emphasize the critical role of gamma oscillations and cortical interneuron ensembles in the modulation of sensory information from the environment.
590 $a School code: 0146.
650 4 $a Psychology, Psychobiology. $3 1017821
650 4 $a Biology, Neuroscience. $3 1017680
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710 2 0 $a New York University. $3 515735
773 0 $t Dissertation Abstracts International $g 64-09B.
790 1 0 $a Welsh, John P., $e advisor
790 $a 0146
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3105884