Fig. 5.

Relationship between the percentage of Fos-positive TH cells in the A7 group on the injected side and the level of XII nerve activity following 10 clonidine injections, of which four were made closer than 0.4 mm from the A7 group; one, 0.4–0.5 mm away, and the remaining five at distances larger than 0.5 mm from the A7 group. There was a significant positive correlation between the level of Fos expression in A7 cells after clonidine and XII nerve activity. R, linear regression coefficient; P, significance level for linear regression; thin lines, 95% confidence interval for the regression.