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. Author manuscript; available in PMC: 2019 Dec 3.
Published in final edited form as: Schizophr Res. 2017 Aug 18;194:70–77. doi: 10.1016/j.schres.2017.07.029

Fig. 1.

Fig. 1.

Smoking apparatus and plasma THC levels. (a) Smoking apparatus consisting of a transparent chamber into which joint was inserted. Patients smoked a placebo or active cannabis cigarette immediately prior to scanning (note: photo taken of member of research team, not study participant). (b) Plasma THC levels in the patient group showed significant increases immediately prior to scanning as compared to baseline (p<0.05). Immediately prior to WM assessment, approximately 30 minutes post scanning, plasma THC levels were somewhat higher (p = 0.053 as compared to baseline), but showed a significant decline from immediately post-intervention resting scan (p<0.05).