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Neural recruitment for the productio...

Moser, Dana C.

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Neural recruitment for the production of native and novel speech sounds.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Neural recruitment for the production of native and novel speech sounds./
Author:	Moser, Dana C.
Description:	109 p.
Notes:	Source: Dissertation Abstracts International, Volume: 68-08, Section: B, page: 5182.
Contained By:	Dissertation Abstracts International68-08B.
Subject:	Health Sciences, Speech Pathology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3280341
ISBN:	9780549210627

Neural recruitment for the production of native and novel speech sounds.
Moser, Dana C.

Neural recruitment for the production of native and novel speech sounds. - 109 p.

Source: Dissertation Abstracts International, Volume: 68-08, Section: B, page: 5182.

Thesis (Ph.D.)--University of South Carolina, 2007.

Purpose. Research suggests that an extensive neural network supports speech production; however, the specific contribution of the cortical areas within this network is not fully understood. There is currently conflicting evidence in the literature regarding which areas of the brain are critical for motor speech planning. The two primary areas of damage that have been implicated in apraxia of speech (AOS) are the left anterior insula (aIns) and the left inferior frontal gyrus (IFG). Because damage to both of these areas often co-exists in the patient population, complimentary evidence can be obtained by investigating normal speech production. Therefore, the purpose of this study was to investigate the neural substrates of motor speech production by examining the occurrence of differential brain activity in the aIns and the IFG during speech production in normal adults.

ISBN: 9780549210627Subjects--Topical Terms:

1018105
Health Sciences, Speech Pathology.

Neural recruitment for the production of native and novel speech sounds.
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005 20140124080550.5
008 150210s2007 ||||||||||||||||| ||eng d
020 $a 9780549210627
035 $a (UMI)AAI3280341
035 $a AAI3280341
040 $a UMI $c UMI
100 1 $a Moser, Dana C. $3 2092613
245 1 0 $a Neural recruitment for the production of native and novel speech sounds.
300 $a 109 p.
500 $a Source: Dissertation Abstracts International, Volume: 68-08, Section: B, page: 5182.
500 $a Adviser: Julius Fridriksson.
502 $a Thesis (Ph.D.)--University of South Carolina, 2007.
520 $a Purpose. Research suggests that an extensive neural network supports speech production; however, the specific contribution of the cortical areas within this network is not fully understood. There is currently conflicting evidence in the literature regarding which areas of the brain are critical for motor speech planning. The two primary areas of damage that have been implicated in apraxia of speech (AOS) are the left anterior insula (aIns) and the left inferior frontal gyrus (IFG). Because damage to both of these areas often co-exists in the patient population, complimentary evidence can be obtained by investigating normal speech production. Therefore, the purpose of this study was to investigate the neural substrates of motor speech production by examining the occurrence of differential brain activity in the aIns and the IFG during speech production in normal adults.
520 $a Method. Thirty English speakers completed a speech-repetition task while undergoing sparse functional magnetic resonance imaging (fMRI). Because the production nonnative speech sounds may provide insight into the plasticity of the speech system, the stimuli consisted of 3-syllable nonwords that contained either: (1) English (native) syllables or (2) non-English (novel) syllables.
520 $a Results. The results revealed a widespread bilateral neural network associated with speech production. More specifically, neural recruitment of the IFG was revealed regardless of the syllable content, and greater neural activation was revealed in the aIns during the production of novel syllables over what was seen during the production of native syllables. Furthermore, cortical activation in the aIns showed a marked decrease over time during the production of novel syllables.
520 $a Conclusions. Together, these findings suggest that the aIns may be important for acquiring and establishing new speech motor representation in the IFG. The aIns may play a key role in learning new motor routines for speech, while the IFG may be important for producing previously acquired routines. Along with providing unique insight into the role of the aIns and IFG in normal motor speech production and learning, the findings of this study may also be beneficial in understanding the mechanisms of rehabilitation and recovery of motor speech impairment following stroke, such as in patients with AOS.
520 $a Key words: Anterior Insula, Inferior Frontal Gyrus, Neuroimaging, Novel Syllables, Speech Production.
590 $a School code: 0202.
650 4 $a Health Sciences, Speech Pathology. $3 1018105
650 4 $a Psychology, General. $3 1018034
690 $a 0460
690 $a 0621
710 2 $a University of South Carolina. $3 1017477
773 0 $t Dissertation Abstracts International $g 68-08B.
790 1 0 $a Fridriksson, Julius, $e advisor
790 $a 0202
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3280341