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Reaction time correlations as a measure of eye-hand coordination

Reaction time correlations as a measure of eye-hand coordination. Heather Dean Pesaran Lab Center for Neural Science New York University. Interconnected brain areas may interact to plan and initiate coordinated movements. Getting at interacting circuits through behavior.

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Reaction time correlations as a measure of eye-hand coordination

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  1. Reaction time correlations as a measure of eye-hand coordination Heather Dean Pesaran Lab Center for Neural Science New York University

  2. Interconnected brain areas may interact to plan and initiate coordinated movements

  3. Getting at interacting circuits through behavior • How are arm movements coordinated with eye movements?

  4. Correlated Reaction Times R = 0.55 Std SRT: 37 ms Std RRT: 41 ms

  5. There are several stages in movement preparation Variability in RT is due to variability in the duration of these stages

  6. Shared sensory processing attention/arousal

  7. Stimulus Onset Asynchrony Task • Delay reach with respect to saccade up to 600 ms. • This will disrupt coordination but not arousal.

  8. SOA is the time between movement go cues

  9. RT Correlations are not due to arousal Correlations between SRT and RRT decrease with increasing time between movements.

  10. Shared sensory processing attention/arousal

  11. Overlap in plans Overlap is defined as the time between the start of the saccade and the cue to begin planning the reach.

  12. RT correlations are nonzero when movement plans overlap Correlations between SRT and RRT increase with increasing time of plan overlap.

  13. Interacting Movement Planning

  14. Accumulating Process Model

  15. Summary • For movement of two effectors, correlations of RTs can show us how coordinated movements are. • When hand and eye movements are made separately, RT correlations disappear. • The degree of correlation seems to depend on the overlap between movement plans. • Simultaneous multiple area recordings will let us identify neural mechanisms for coupling movement plans

  16. Acknowledgements Pesaran Lab Funding Bijan Pesaran Patterson Trust Eva Tsui Swartz Foundation Bridget DiPrisco Burroughs-Wellcome Fund Alfred P Sloan Foundation

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