Presentation Title

NEURAL ACTIVITY IS SYNCHRONIZED DURING FINGER TAPPING WITH PERIODIC, RANDOM OR FRACTAL METRONOMES

Presenter Information

Shivam Avinash GaikwadFollow

Advisor Information

Vivien Marmelat, Ryan Meidinger

Presentation Type

Poster

Start Date

26-3-2021 12:00 AM

End Date

26-3-2021 12:00 AM

Abstract

Neural activity peaks in amplitude similar to the frequency of metronomes when motor synchronization such as finger tapping is associated with periodic rhythms. Neural activity is also known to show patterns of fractal fluctuations which are non-periodic rhythms, but it is unknown how neural activity synchronizes with non-periodic (fractal or random) metronomes. Here, we make the hypothesis that synchronization of neural activity with fractal metronomes will result in lower amplitude activity at mean frequency, due to a wider distribution of beat intervals around the mean frequency in fractal rhythms. Twenty healthy young adults seated in dimly lit room were fitted with electroencephalogram (EEG) to monitor neural activity. Participants were asked to tap their dominant index finger on a pressure sensitive pad with consistent posture throughout the collection. They were given synchronized finger tapping tasks while listening to types of metronomes through a loudspeaker. Cortical data between 1.5 to 2.5 Hz in electrodes from midline frontal and occipital was compared based on the frequency present in the metronomes. One-way ANOVA were used to determine significance between the conditions for each electrode (p<0.05). There was no significant difference between conditions of frontal and occipital cortical recordings, but large inter-individual variations were evident. Peak amplitude of neural activity was observed near 2Hz. Non-parametric assessment is to be used in further to obtain goodness of fit between metronomes and cortical recordings. Our study contributes to the current understanding of perception of day-to-day rhythms in human brain and its effect on motor synchronization.

Comments

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Mar 26th, 12:00 AM Mar 26th, 12:00 AM

NEURAL ACTIVITY IS SYNCHRONIZED DURING FINGER TAPPING WITH PERIODIC, RANDOM OR FRACTAL METRONOMES

Neural activity peaks in amplitude similar to the frequency of metronomes when motor synchronization such as finger tapping is associated with periodic rhythms. Neural activity is also known to show patterns of fractal fluctuations which are non-periodic rhythms, but it is unknown how neural activity synchronizes with non-periodic (fractal or random) metronomes. Here, we make the hypothesis that synchronization of neural activity with fractal metronomes will result in lower amplitude activity at mean frequency, due to a wider distribution of beat intervals around the mean frequency in fractal rhythms. Twenty healthy young adults seated in dimly lit room were fitted with electroencephalogram (EEG) to monitor neural activity. Participants were asked to tap their dominant index finger on a pressure sensitive pad with consistent posture throughout the collection. They were given synchronized finger tapping tasks while listening to types of metronomes through a loudspeaker. Cortical data between 1.5 to 2.5 Hz in electrodes from midline frontal and occipital was compared based on the frequency present in the metronomes. One-way ANOVA were used to determine significance between the conditions for each electrode (p<0.05). There was no significant difference between conditions of frontal and occipital cortical recordings, but large inter-individual variations were evident. Peak amplitude of neural activity was observed near 2Hz. Non-parametric assessment is to be used in further to obtain goodness of fit between metronomes and cortical recordings. Our study contributes to the current understanding of perception of day-to-day rhythms in human brain and its effect on motor synchronization.