| Popis: |
Physiological tremors are slight oscillations that are produced when head and limbs are left unsupported in healthy individuals. This study aims to verify the presence of neurogenic component in physiological hand tremor by appropriately choosing a neurophysiological parameter (i.e. visual cue – eyes open and eyes closed). The physiological hand tremor was recorded from eight subjects while performing three tasks – rest, postural and action under eyes open and eyes closed conditions. Accelerometer and EMG sensors were fixed at fingers, wrist, forearm, biceps and deltoid muscles. Consequently, time and frequency domain features were extracted from accelerometer and EMG data. One-way ANOVA was performed to evaluate the statistical difference (p < 0.05) between the two conditions. Our study concluded that visual cue had a significant effect on physiological hand tremor only during action task. Besides, the amplitude of the hand tremor was reduced during eyes open condition due to increase in voluntary muscle force, which showcased the positive influence of neurogenic component on physiological hand tremor. |
