" [Quantatative radiography has established that a cannabinoid receptor system in the brain] "is the same receptor [system] that mediates all of the behavioral and pharmacological effects of cannabinoids . . ."

Herkenham, M., Lynn, A.B., et al., (1990) "Cannabinoid Receptor Localization in Brain," Proceedings of the National Academy of Sciences, 87:1932-1936, 1990. pg. 1935.