Is Muscle Tone a Predictor of Our Ability to Inhibit?

We aimed to examine the relationship between muscles affected by various movement disorders and the ability to inhibit response. Our designed included 46 participants between the age of 30-80 years, diagnosed with movement disorders, in a cross-sectional study. The muscles were measured using the Modified Ashworth Scale (MAS) scaled from 0 (normal) to 4 (rigid) of the upper limbs. Response inhibition was assessed using a Go-No Go experimental task. Composite scores of errors and correct were calculated. Later on, the scores of muscle tone and Go-No Go task were put through a linear ordinal regression analysis to find out the relationship between the two variables. Significant relationship was found between both the variables. Muscle tone independently predicted the performance of response inhibition. The data suggested that that increase in the muscle tone directly affect the response inhibition. While there was no relationship found between the muscle strength and reflexes and response inhibition.