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asmith@purdue.edu
Neurophysiological Bases of Speech Production/Language
and Motor Interactions
B.A., 1972, Psychology, Kalamazoo College
M.A., 1974, Speech Science, University of Iowa
Ph.D., 1978, Speech Science, University of Iowa
Postdoctoral Trainee, Department of Physiology and
Biophysics, University of Washington
My research program focuses on the neurophysiological
bases of speech production. My research has addressed
a range of questions, but these questions generally
relate to the overall problem of how the brain controls
the production of speech. I have worked intensively
on the problem of stuttering since 1989, when I began
work on a project, “Physiological Correlates of Stuttering.”
I am currently focusing much of my research effort on
the physiological conditions necessary for the forward
flow of speech and those that lead to disruptions of
speech in stuttering. The work on stuttering naturally
led to an interest in the development of speech production,
and our group has just completed a five-year project
on speech motor development in children aged 4-years
to young adults. Both the stuttering work and the developmental
experiments have led us to explore interactions between
language processing and speech motor performance. In
current experiments we are recording event-related potentials
of the brain during language processing tasks as well
as speech movement data during speech production. We
are testing the general hypothesis that language processing
and speech motor control are much more tightly linked
than earlier models would predict.
SELECTED PUBLICATIONS:
Smith, A. (1992). The control of orofacial movements
in speech. Critical Reviews in Oral Biology and
Medicine, 3, 233-267.
Smith, A., Goffman, L., Zelaznik, H., Ying, G., and
McGillem, C. (1995). Spatiotemporal stability and
patterning of speech movement sequences. Experimental
Brain Research, 104, 493-501.
Smith, A. (1999). Stuttering: A unified approach
to a multifactorial, dynamic disorder. In Research
and Treatment of Fluency Disorders: Bridging the
Gap. N. Ratner and C. Healey (Eds). Mahwah,
NJ: Erlbaum, p. 27-44.
Maner, K., Smith, A., & Grayson, L. (2000). Influences
of length and syntactic complexity on speech motor
performance of children and adults. Journal of
Speech, Language, and Hearing Research, 43,
560-573.
Kleinow, J., & Smith, A. (2000). Influences of
length and syntactic complexity on the speech motor
stability of the fluent speech of adults who stutter.
Journal of Speech, Language, and Hearing Research
43, 548-559.
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