Presentation Information
[P3-12]The effect of temporal regularity on neural activity during perceptual and motor timing
*Mitsuki Niida1, Kenji Ogawa1 (1. Hokkaido University (Japan))
Keywords:
sub-second timing,temporal regularity,auditory,basal ganglia,cerebellum
Perceptual and motor timing in the sub-second range are crucial for daily life, and temporal regularity is a key feature, especially in musical contexts. Previous research has shown that, in perceptual timing, regular stimuli are associated with the basal ganglia, whereas irregular stimuli rely on the cerebellum. Although perceptual and motor timing share some common neural bases, including the basal ganglia and cerebellum, distinct brain activations for regular and irregular stimuli in motor timing have not been demonstrated.
We conducted a functional magnetic resonance imaging (fMRI) experiment to compare the effects of temporal regularity on perceptual and motor timing within the same experimental paradigm. Participants performed two tasks with two types of auditory stimuli: regular and irregular sequences consisting of multiple clicks. In the perceptual task, participants judged the duration of the last interval in the sequence by comparing it to the second-to-last interval and pressed one of two buttons to respond. In the motor task, participants pressed a button after the last click to align their button press with the last two clicks in an isochronous manner.
Regarding the task effect, broad areas, including the premotor cortex, supplementary motor area, and cerebellum, were more activated during the perceptual task than the motor task, likely due to the different button-pressing requirements. Regarding the regularity effect, the putamen, a part of the basal ganglia, showed greater activation for regular than irregular stimuli. However, no significant activation was observed for irregular stimuli compared to regular. No interaction was found between task and stimulus regularity.
Although regular stimuli elicited greater activation in the basal ganglia, we found no difference in the regularity effect between perceptual and motor timing on timing-related brain activity.
We conducted a functional magnetic resonance imaging (fMRI) experiment to compare the effects of temporal regularity on perceptual and motor timing within the same experimental paradigm. Participants performed two tasks with two types of auditory stimuli: regular and irregular sequences consisting of multiple clicks. In the perceptual task, participants judged the duration of the last interval in the sequence by comparing it to the second-to-last interval and pressed one of two buttons to respond. In the motor task, participants pressed a button after the last click to align their button press with the last two clicks in an isochronous manner.
Regarding the task effect, broad areas, including the premotor cortex, supplementary motor area, and cerebellum, were more activated during the perceptual task than the motor task, likely due to the different button-pressing requirements. Regarding the regularity effect, the putamen, a part of the basal ganglia, showed greater activation for regular than irregular stimuli. However, no significant activation was observed for irregular stimuli compared to regular. No interaction was found between task and stimulus regularity.
Although regular stimuli elicited greater activation in the basal ganglia, we found no difference in the regularity effect between perceptual and motor timing on timing-related brain activity.