Key result
Loud stressing sound increases tremor amplitude variation by ~248% compared to rest.
Why the study?
Measuring physiological tremor registers involuntary components of psychoemotional reactions, prompting a comparative analysis of tremor registration methods and the development of a pen-shaped tensometric device.
Does exposure to a loud stressing sound increase physiological tremor measured by a novel tensotremometric device in healthy participants?
Does exposure to a loud stressing sound increase physiological tremor measured by a novel tensotremometric device in healthy participants?
A novel pen-shaped tensotremometric device successfully detected statistically significant increases in physiological tremor in response to a loud acoustic stressor.
Acoustic stress may heighten physiological tremor; leaves open clinical utility of tensotremometry pending validation studies.
Introduction. One of the methods of assessing human psychoemotional reactions (PER) is measuring motor system activity. Traditionally, to register involuntary components of PER methods of measuring physiological tremor are used. This paper presents comparative analysis of different methods for tremor registration and also presents a description of a new pen-shaped device outfitted with tensometric sensors to assess severity of stress PER. Methods. The device includes tensometric sensors connected to analog-digital conversion device and microcontroller in order to translate the signal to administrator’s terminal. The signal contains tensotremorometric data from three fingers, corrected according to maximum voluntary contraction (MVC) of the subject. Said signal is then divided into overlapping segments which are then filtered for the frequency of physiological tremor and analyzed using Epps-Singleton criteria. Results. A plan of study that allows to assess severity of stress reaction using presented device is tested. It is shown that if a stressor is introduced, then changes of the background tensotremorogram coincides with the moment of stressor introduction. A prototype for software-hardware complex for assessing PER based on tensotremometry registration and analysis is introduced. Discussion. Hypotheses regarding the specifics of connection between tensotremorogram changes and stressor characteristics are formulated. Further developments of technology are discussed.
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Белинский et al. (2023) studied Psychoemotional stress reactions (n=10). Loud stressing sound vs. No stimuli (rest) was evaluated on Difference between minimal and maximal amplitude of tremor (Δ, % MVC). A loud stressing sound significantly increased the difference between minimal and maximal amplitude of tremor to 10.83% of maximum voluntary contraction compared to 3.11% at rest.
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