Distinct spatial patterns of neural and physiology-related activity in the human periaqueductal grey during anticipatory social stress.
Theriault, J. E.; Fischbach, A. K.; Kragel, P. A.; Wager, T. D.; Wald, L. L.; Bianciardi, M.; Quigley, K. S.; Barrett, L. F.; Satpute, A. B.
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Periaqueductal gray (PAG) columns mediate affective experience, physiological regulation, and survival-related behavior; yet, only 7T imaging can resolve these small structures in humans. In a social stress task, participants prepared a speech, and we observed (a) bilateral ventrolateral PAG activity, relative to baseline, and (b) distinct spatial patterns of correlation between PAG activity and physiological response (i.e., cardiac interbeat interval, reparation rate, and tonic electrodermal activity).
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