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J Neurophysiol 101: 2725-2732, 2009. First published February 18, 2009; doi:10.1152/jn.91099.2008
0022-3077/09 $8.00
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Area Spt in the Human Planum Temporale Supports Sensory-Motor Integration for Speech Processing

Gregory Hickok1, Kayoko Okada1 and John T. Serences2

1Department of Cognitive Sciences and Center for Cognitive Neuroscience, University of California, Irvine, 2Department of Psychology, University of California, San Diego, California

Submitted 1 October 2008; accepted in final form 11 February 2009

Processing incoming sensory information and transforming this input into appropriate motor responses is a critical and ongoing aspect of our moment-to-moment interaction with the environment. While the neural mechanisms in the posterior parietal cortex (PPC) that support the transformation of sensory inputs into simple eye or limb movements has received a great deal of empirical attention—in part because these processes are easy to study in nonhuman primates—little work has been done on sensory-motor transformations in the domain of speech. Here we used functional magnetic resonance imaging and multivariate analysis techniques to demonstrate that a region of the planum temporale (Spt) shows distinct spatial activation patterns during sensory and motor aspects of a speech task. This result suggests that just as the PPC supports sensorimotor integration for eye and limb movements, area Spt forms part of a sensory-motor integration circuit for the vocal tract.

Address for reprint requests and other correspondence: G. Hickok, Center for Cognitive Neuroscience, Department of Cognitive Sciences, University of California, Irvine, CA 92697 (E-mail: greg.hickok{at}uci.edu) or to J. Serences, Department of Psychology, University of California, San Diego, CA 92093 (E-mail: jserences{at}ucsd.edu)






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