Pot Smokers’ Lack Of Ambition May Be Explained


LONDON (UPI) — Long-term marijuana users tend to produce less of a brain chemical linked to motivation, British researchers say.

Study leader Dr. Michael Bloomfield of the Institute of Clinical Sciences at Imperial College London and colleagues at University College London and King’s College London used PET brain imaging to look at dopamine production in the brains of 19 regular marijuana users and 19 non-users of matching age and sex.

The marijuana users all experienced psychotic-like symptoms while smoking the drug, such as experiencing strange sensations or having bizarre thoughts like feeling as though they are being threatened by an unknown force.

The researchers expected dopamine production might be higher in this group, since increased dopamine production has been linked with psychosis, but they found the opposite effect, the study said.

UPI - United Press International, Inc.

Since 1907, United Press International (UPI) has been a leading provider of critical information to media outlets, businesses, governments and researchers worldwide.

Join the Discussion

Comment Policy: We encourage an open discussion with a wide range of viewpoints, even extreme ones, but we will not tolerate racism, profanity or slanderous comments toward the author(s) or comment participants. Make your case passionately, but civilly. Please don't stoop to name calling. We use filters for spam protection. If your comment does not appear, it is likely because it violates the above policy or contains links or language typical of spam. We reserve the right to remove comments at our discretion.