Computerized transaxial tomography (CTT) studies of 12 young men having histories of heavy cannabis smoking revealed no evidence of cerebral atrophy.
(JAMA 237:1229-1230, 1977)
Co BT, Goodwin DW, Gado M, Mikhael M, Hill SY. Absence of Cerebral Atrophy in Chronic Cannabis UsersEvaluation by Computerized Transaxial Tomography. JAMA. 1977;237(12):1229–1230. doi:10.1001/jama.1977.03270390045024