Online Lecture: The Dual Stream Model: Clarifications and Recent Progress
Thursday, January 19th 2016, 2pm EDT (11am Pacific Time)
The Dual Stream Model: Clarifications and Recent Progress
University of California, Irvine
This talk presents an overview of the Hickok & Poeppel Dual Stream model and its recent development. We start with a brief discussion of the origins of the model and several points of clarification. Specifically, I will re-emphasize that the division of labor between the streams turns on two broad functions—speech comprehension (ventral stream) and speech production (dorsal stream)—and that the relation between these streams is asymmetric in that speech production relies on sensory systems whereas speech comprehension is not dependent on motor systems. We then turn to recent developments of the model, particularly with respect to the dorsal stream. Regarding the dorsal stream, I will argue that the system is best conceptualized as a sensory-motor feedback control mechanism that operates over not only auditory-motor planning representations but also somatosensory-motor planning representations. This architecture provides a new way of thinking about the neural implementation of traditional linguistic levels of processing (segments, syllables, and sequences of syllables). I’ll finish with a discussion of a new hypothesis regarding the function of area Spt and its implications for understanding the neural and computational basis of speech production.
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C-STAR LECTURE SERIES
The Center for the Study of Aphasia Recovery (C-STAR; http://cstar.sc.edu) houses researchers who examine the effects of behavioral treatment, brain stimulation, and residual brain function (brain plasticity) on recovery from aphasia. C-STAR is a collaboration between researchers from the University of South Carolina, the Medical University of South Carolina, Johns Hopkins University, and the University of California, Irvine. The Center is funded through the National Institute of Deafness and Communication Disorders (NIDCD) grant #NIH P50 DC014664. Biweekly public lectures, given by members and guests of C-STAR, are accessible live and online. Recordings of the lectures can be viewed via C-STAR YouTube channel: https://www.youtube.com/channel/UC8p0CuG4He9nqCR4nnzhZ7w
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