0000000001034767

AUTHOR

Richard B. Ivry

showing 2 related works from this author

Influence of Delay Period Duration on Inhibitory Processes for Response Preparation.

2015

In this study, we examined the dynamics of inhibitory preparatory processes, using a delayed response task in which a cue signaled a left or right index finger (Experiment 1) or hand (Experiment 2) movement in advance of an imperative signal. In Experiment 1, we varied the duration of the delay period (200, 500, and 900 ms). When transcranial magnetic stimulation (TMS) was applied 100 ms before the imperative, motor evoked potentials (MEPs) elicited in the first dorsal interosseous were strongly inhibited. For delays of 500 ms or longer, this inhibition was greater when the targeted muscle was selected compared with when it was not selected. In contrast, the magnitude of inhibition just aft…

AdultMalemedicine.medical_specialtyTime FactorsCognitive Neurosciencemedicine.medical_treatmentPeripheral nerve stimulationFlexor carpi radialis musclePyramidal TractsAudiologyNeuropsychological TestsInhibitory postsynaptic potentialChoice Behavior050105 experimental psychologyFingersH-Reflex03 medical and health sciencesCellular and Molecular NeuroscienceYoung Adult0302 clinical medicinemedicineHumans0501 psychology and cognitive sciencesPeripheral NervesMuscle Skeletalbusiness.industryElectromyography05 social sciencesMotor CortexIndex fingerArticlesAnticipation PsychologicalEvoked Potentials MotorAnticipationTranscranial Magnetic StimulationElectric StimulationSurgeryTranscranial magnetic stimulationInhibition Psychologicalmedicine.anatomical_structureDuration (music)FemaleH-reflexbusiness030217 neurology & neurosurgeryPsychomotor PerformanceCerebral cortex (New York, N.Y. : 1991)
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Generic Inhibition of the Selected Movement and Constrained Inhibition of Nonselected Movements during Response Preparation

2014

Abstract Previous studies have identified two inhibitory mechanisms that operate during action selection and preparation. One mechanism, competition resolution, is manifest in the inhibition of the nonselected response and attributed to competition between candidate actions. The second mechanism, impulse control, is manifest in the inhibition of the selected response and is presumably invoked to prevent premature response. To identify constraints on the operation of these two inhibitory mechanisms, we manipulated the effectors used for the response alternatives, measuring changes in corticospinal excitability with motor-evoked potentials to TMS. Inhibition of the selected response (impulse …

MaleMovementCognitive Neurosciencemedicine.medical_treatmentPyramidal TractsMotion PerceptionContext (language use)ElectromyographyInhibitory postsynaptic potentialAction selectionArticleFunctional LateralityFingersYoung AdultReaction TimemedicineHumansMotion perceptionMuscle SkeletalCommunicationPyramidal tractsmedicine.diagnostic_testElectromyographybusiness.industryMechanism (biology)Evoked Potentials MotorTranscranial Magnetic StimulationTranscranial magnetic stimulationmedicine.anatomical_structureData Interpretation StatisticalFemalebusinessPsychologyNeurosciencePhotic StimulationPsychomotor PerformanceJournal of Cognitive Neuroscience
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