Functional Correlates of Increasing Gestural Articulatory Fluency Using a Miniature Second-Language ApproachNewman-Norlund R.D.
Department of Exercise Science, University of South Carolina, Columbia, S.C., USA
Objectives: Gesture-based second languages have become an important tool in the rehabilitation of language-impaired subpopulations. Acquiring the ability to use manual gestures as a means to construct meaningful utterances places unique demands on the brain. This study identified changes in the blood oxygen level-dependent (BOLD) signal associated with the development of gestural fluency using a miniature second-language-based approach. Participants and Methods: Twelve healthy right-handed adults (19-31 years) were trained to produce sequences of meaningful gestures over a period of 2 weeks. Functional magnetic resonance imaging was used to identify brain regions involved in actual and imagined production of meaningful sentences both before (nonfluent production) and after (fluent production) practice. Results: Brain areas showing learning-dependent increases in activity associated with the development of fluency included sites associated with language articulation, while learning-related decreases in the BOLD signal were observed in cortical networks associated with motor imagery, and native language processing. Conclusion: These findings provide novel insights regarding the neural basis of fluency that could inform the design of interventions for treating speech disorders characterized by the loss of fluency.
Roger D. Newman-Norlund
Department of Exercise Science, University of South Carolina
Discovery I Building, Rm. 202D, 915 Greene Street
Columbia, SC 29803 (USA)
Published online: March 5, 2014
Number of Print Pages : 7
Number of Figures : 2, Number of Tables : 0, Number of References : 43
Additional supplementary material is available online - Number of Parts : 1
Folia Phoniatrica et Logopaedica (International Journal of Phoniatrics, Speech Therapy and Communication Pathology)
Vol. 65, No. 4, Year 2013 (Cover Date: May 2014)
Journal Editor: Weismer G. (Madison, Wisc.)
ISSN: 1021-7762 (Print), eISSN: 1421-9972 (Online)
For additional information: http://www.karger.com/FPL