Figure 3.

GABAergic Relationships Show Anatomical Specificity: Experiment 2

An independent replication of the correlations between S1 GABAergic tone, cortical tuning, and tactile perceptual acuity in experiment 1, and evidence of the anatomical specificity of the neurochemical relationship using a V1 MRS control voxel.

(A) Significant correlations between cortical tuning in S1 and S1 cortical GABA, but neither S1 glutamate (Hittner’s: Z = 2.60, p = 0.0047) nor V1 GABA (Hittner’s Z = 1.65, p = 0.049).

(B) Tactile perceptual acuity correlates strongly with S1 GABA, but with neither S1 glutamate, nor V1 GABA (Hittner’s Z = −2.31, p = 0.0104).

(C) Cortical tuning correlates with tactile perceptual acuity. ^∗p < 0.05 Hittner’s test. Abbreviations as per Figure 2.

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