Noise stimulation had an immediate effect on improving balance control. The present study aimed to clarify the immediate neuromuscular adaptation induced by noise stimulation and find the correlation between neuromuscular adaptation and functional performance.
The mechanism behind noise stimulation is called Stochastic Resonance which improves the detectivity of sensory input with the presence of noise, making sub-sensory threshold input detectable. Noise stimulation had been proved to improve postural control, Ia afferent sensitivity, and muscle activity of the tibialis anterior. With this evidence of the effect of noise stimulation on balance enhancement, the neuromuscular adaptation induced by noise stimulation has not been researched yet. Therefore, the present study aims to clarify the immediate effect of noise on neuromuscular regulation during postural control.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
SINGLE
Enrollment
20
The intensity of electrical noise stimulation will be set at 90% of the sensory threshold of each participant.
Participants will not receive stimulation.
The foam will be used to make an unstable surface.
National Yang-Ming University
Taipei, Taiwan
Mean sway path of the center of pressure
The mean sway path in mm will represent balance performance
Time frame: 40 seconds under each condition
Mean sway velocity of the center of pressure
The mean sway velocity in mm/sec will represent balance performance
Time frame: 40 seconds under each condition
Cortical excitability
Power spectrum density of EEG will calculated for representing cortical excitability.
Time frame: 40 seconds under each condition
Spinal reflex excitability
H reflex amplitude will represent the excitability of peripheral control from spinal level nerve system.
Time frame: 40 seconds under each condition
Co-activation index
Co-activation index will be calculated by EMG activity of Tibialis Anterior and Soleus muscle to represent the muscle activity.
Time frame: 40 seconds after each condition
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