Rich Ivry

Professor of Psychology and Neuroscience
Keywords: controls
Research Areas: cognitive neuroscience, cognition and action, skill acquisition and coordination, research with healthy and neurologically impaired populations, brain imaging

Research Description:

My research explores the neural basis of sensorimotor control and learning. Our experiments involve neurologically healthy and impaired individuals, use behavioral and neuroimaging methods to characterize the functional role of different parts of the motor pathways. For example, we have hypothesized that a primary role for the cerebellum is to regulate the temporal aspects of movement. Moreover, the cerebellum also appears to be involved in perceptual tasks that require precise timing. We are currently exploring how the brain may represent temporal information at a mechanistic level. We hypothesize that the cerebellum may be conceptualized as a network of interval-based timing elements, with these elements tuned to specific intervals that are task-specific.

This decade has seen a great deal of interest in higher-level functions of the cerebellum, inspired by various results in the neuroimaging literature as well as intriguing findings that this structure is abnormal in autistic individuals. Functional hypotheses include the idea that this structure is essential for attention shifting, internal speech, and/or preparation of response alternatives. We are testing these hypotheses in our patient population.

Another primary area of research involves the study of motor learning. We have conducted behavioral and neuroimaging studies comparing explicit and implicit motor sequence learning. This work suggests separable psychological and neural systems associated with these two forms of motor learning. Our current work is designed to clarify differences between the systems in terms of how they represent learned associations.

Selected Publications:

  • 1. Diedrichsen, J., Grafton, S., Albert, N., Hazeltine, E., and Ivry, R.B. Goal-selection and movement- related conflict during bimanual reaching movements. Cerebral Cortex., 16, 1729-1738, 2006.
  • Diedrichsen, J., Verstynen, T., Lehman, S.L., and Ivry, R.B. Cerebellar involvement in anticipating the consequences of self-produced actions during bimanual movements. Journal of Neurophysiology., 93, 801-812, 2005.
  • Verstynen, T., Diedrichsen, J., Albert, N., Aparicio, P., and Ivry, R.B. Ipsilateral motor cortex activity during unimanual hand movements relates to task complexity. Journal of Neurophysiology, 93, 1209-1222, 2005.
  • Ivry, R.B. and Spencer, R.C.M. The neural representation of time. Current Opinion in Neurobiology, 14, 225-232, 2004.
  • Spencer, R.C.M., Zelaznik, H.N., Diedrichsen, J., and Ivry, R.B. Disrupted timing of discontinuous but not continuous movements by cerebellar lesions. Science, 300, 1437-1439, 2003.
  • Sternad, D., Wei, K., Diedrichsen, J., and Ivry, R.B. Intermanual interactions during initiation and production of rhythmic and discrete movements in individuals lacking a corpus callosum. Experimental Brain Research, 176, 559-574, 2007.
  • Verstynen, T., Konkle, T., and Ivry, R.B. Two types of TMS-induced movement variability following stimulation of the primary motor cortex. Journal of Neurophysiology, 96, 1018-1029, 2006.
  • Spencer, R.C.M., Ivry, R.B., Cattaert, D., and Semjen, A. Bimanual coordination during rhythmic movements in the absence of somatosensory feedback. Journal of Neurophysiology, 94, 2901-2910, 2005.
  • Keele, S.W., Ivry, R.B., Mayr, U., Hazeltine, E., and Heuer, H. The cognitive and neural architecture of sequence representation. Psychological Review, 110, 316-330, 2003.
  • Kennerley, S.W., Diedrichsen, J., Hazeltine, E., Semjen, A., and Ivry, R.B. Callosotomy patients exhibit temporal and spatial uncoupling during continuous bimanual movements. Nature Neuroscience, 5, 376-381, 2002.

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