Effects of inhibitory pressure on tone: An experimental study.

INTRODUCTION : Tone is defined as the resistance of muscle to passive elongation or stretch. It is also said to be in a state of readiness. It represents the residual contractions in normally innervated resting muscle or steady state contractions. Changes in tone lead to hypertonia or hypotonia. OBJECTIVES : 1. To standardize pressure Threshold value. 2. To find the effect of inhibitory pressure on tone. METHODS : Research design - Experimental study design. Settings - Padmavathy College of Physiotherapy. PG Research lab which was maintained in room temperature. Sampling - Samples were collected for the study in a random manner. Inclusion criteria - a) All healthy subjects with normal tone b) Muscle power 5, c) Normal H-Reflex. Exclusion criteria - a) Any neuro, ortho, and cardo problems, b) Any local lesions. Statistical Methods -The collected data were tabulated and analyzed using descriptive statistics to assess all the parameters mean and standard deviation was used. To find out significant changes between pre-test and post test by paired t-test. To find the effect of inhibitory pressure on tone paired t-test was used. CONCLUSION: The result of this study demonstrate that the application of inhibilitory pressure to the right tendoachillis produces a decrease in the peak to peak amplitude of H-reflex until 5 minutes and by 10 minutes the peak to peak amplitude comes to normal. The latency showed an increase in peak to peak until 5 minutes later by 10 minutes comes to normal. The inhibitory pressure response was sustained for 5 minutes. The effect of inhibitory pressure was transitory, with the return of base line levels of Hreflex after 5 minutes.