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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.

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