Neuropsychological consequences of regular marijuana use: a twin study.

@article{Lyons2004NeuropsychologicalCO,
  title={Neuropsychological consequences of regular marijuana use: a twin study.},
  author={Michael J Lyons and Jessica L Bar and Matthew S. Panizzon and Rosemary Toomey and Sarah Eisen and Hong Xian and Ming T. Tsuang},
  journal={Psychological medicine},
  year={2004},
  volume={34 7},
  pages={1239-50}
}
BACKGROUND Results of previous research examining long-term residual effects of marijuana use on cognition are conflicting. A major methodological limitation of prior studies is the inability to determine whether differences between users and non-users are due to differences in genetic vulnerability preceding drug use or due to the effects of the drug. METHOD Fifty-four monozygotic male twin pairs, discordant for regular marijuana use in which neither twin used any other illicit drug… CONTINUE READING

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