(A) BOLD response of BA3a in the AA, NA, and TA groups. AA and NA, P < 0.63; TA, P < 0.005, Kruskal Wallis. (B) Time course of the signal change in BOLD response in BA3a during the task, averaged by group. (C) Correlation of the BA3a BOLD response to the fascicle strain from the tibialis anterior (r = 0.66) during cycles of dorsi- and plantarflexion. (D) Correlation of the BA3a BOLD response to the score of a position differentiation task, requiring proprioception (r = 0.64). For plots in C and D, the cross bars represent the mean and standard deviation of each group and AA and TA groups cluster distinctly in both (*P < 0.005 MANOVA).