PET scans help identify mechanism underlying seasonal mood changes

Brain scans taken at different times of year suggest that the actions of the serotonin transporter—involved in regulating the mood-altering neurotransmitter serotonin—vary by season, according to a report in the September issue of Archives of General Psychiatry. These fluctuations may potentially explain seasonal affective disorder and related mood changes.

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<p><a href="http://www.physorg.com/news139570561.html">PET scans help identify mechanism underlying seasonal mood changes</a></p> <p>Brain scans taken at different times of year suggest that the actions of the serotonin transporter—involved in regulating the mood-altering neurotransmitter serotonin—vary by season, according to a report in the September issue of <I>Archives of General Psychiatry</I>. These fluctuations may potentially explain seasonal affective disorder and related mood changes.</p>