The tactile sense was measured by Smmes-Weinstein Monofilaments in the middle of uvula and both side of hard palate,then the threshold of the uvula minus, the average threshold of the hard palate as the standardized palatal sensory threshold(SPST). 
Smmes-Weinstein Monofilaments
Mann-Whitney U test for comparing two independent samplesand partial correlation analysis. 
Mann-Whitney U test
Mann-Whitney U test for comparing two independent samplesand partial correlation analysis. 
partial correlation analysis