Premotor neural correlates of predictive motor timing for speech production and hand movement: evidence for a temporal predictive code in the motor system

The predictive coding model suggests that neural processing of sensory information is facilitated for temporally-predictable stimuli. This study investigated how temporal processing of visually-presented sensory cues modulates movement reaction time and neural activities in speech and hand motor sys...

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Vydáno v:	Experimental brain research Ročník 235; číslo 5; s. 1439 - 1453
Hlavní autoři:	Johari, Karim, Behroozmand, Roozbeh
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2017 Springer Springer Nature B.V
Témata:	Adult Analysis of Variance Behavioral responses Biological markers Biomedical and Life Sciences Biomedicine Brain - physiology Brain Mapping Cues Electroencephalography Event-related potentials Evoked Potentials - physiology Female Hand Hands Humans Information processing Investigations Male Motor neurons Movement - physiology Neurology Neurophysiology Neurosciences Physiological aspects Predictions Predictive Value of Tests Psychomotor Performance - physiology Reaction time Reaction Time - physiology Research Article Speech Speech perception Speech production Stimuli Temporal processing Time Time Perception - physiology Time use Vocalization Vowels Young Adult United States Temporal processing Speech production Predictive code ERP Internal forward model Hand movement
ISSN:	0014-4819, 1432-1106
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Shrnutí:	The predictive coding model suggests that neural processing of sensory information is facilitated for temporally-predictable stimuli. This study investigated how temporal processing of visually-presented sensory cues modulates movement reaction time and neural activities in speech and hand motor systems. Event-related potentials (ERPs) were recorded in 13 subjects while they were visually-cued to prepare to produce a steady vocalization of a vowel sound or press a button in a randomized order, and to initiate the cued movement following the onset of a go signal on the screen. Experiment was conducted in two counterbalanced blocks in which the time interval between visual cue and go signal was temporally-predictable (fixed delay at 1000 ms) or unpredictable (variable between 1000 and 2000 ms). Results of the behavioral response analysis indicated that movement reaction time was significantly decreased for temporally-predictable stimuli in both speech and hand modalities. We identified premotor ERP activities with a left-lateralized parietal distribution for hand and a frontocentral distribution for speech that were significantly suppressed in response to temporally-predictable compared with unpredictable stimuli. The premotor ERPs were elicited approximately −100 ms before movement and were significantly correlated with speech and hand motor reaction times only in response to temporally-predictable stimuli. These findings suggest that the motor system establishes a predictive code to facilitate movement in response to temporally-predictable sensory stimuli. Our data suggest that the premotor ERP activities are robust neurophysiological biomarkers of such predictive coding mechanisms. These findings provide novel insights into the temporal processing mechanisms of speech and hand motor systems.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23
ISSN:	0014-4819 1432-1106
DOI:	10.1007/s00221-017-4900-0