Figure 2.

GABAergic Tone Reflects Cortical Tuning and Tactile Perceptual Acuity in the Somatosensory System: Experiment 1

(A) A strong relationship exists between cortical tuning in S1 and local GABA, but not glutamate.

(B) Tactile perceptual acuity correlates strongly with S1 GABA, but not with S1 glutamate.

(C) Cortical tuning correlates with tactile perceptual acuity; greater tuning is associated with better tactile abilities. ^∗p < 0.05 Hittner’s test. JND, just noticeable difference; Cr, total creatine. Blue lines, confidence bounds. The significant difference in (A) persists with n = 11 (filled circles; Hittner’s Z = 2.00, p = 0.023).

See also Figures S1–S4 and Tables S2 and S3.