Fig. 7.

Results from data analysis for extinction coefficient and birefringence measurements. (a) Extinction coefficients in nerve and muscle tissue samples follow a Gaussian distribution. The difference in distributions in nerve and muscle samples is statistically significant ($P<0.001$). (b) Distribution of birefringence in nerve and muscle tissue samples. Both distributions are nearly Gaussian, with long tails and slightly different means, but the difference in these distributions is less pronounced ($P=0.15$).