Fig. 3. Least squares regression lines of the regional ¹¹C-flumazenil distribution volume ratios of subject 1 in the 1.0–minimum alveolar concentration (MAC) isoflurane group measured during control and isoflurane conditions versus  human GABA^A–benzodiazepine (GABA^A/BZD) density data published by Braestrup et al.  16Each data point represents one measurement. CE = cerebellar cortex; FR = gyrus frontalis inferior; OC = gyrus occipitalis lateralis; PO = pons; TE = gyrus temporalis inferior; TH = thalamus.