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No change in the number of VIP-producing neurons in the brain's internal clock of homosexual men compared to vasopressin-producing neurons
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Abstract
Homosexual men have more than twice as many vasopressin neurons in the suprachiasmatic nucleus compared to heterosexual men.
- No difference was observed in the number of neurons expressing vasoactive intestinal polypeptide between homosexual and heterosexual men.
- The nuclear diameter of both vasoactive intestinal polypeptide and vasopressin neurons is reduced in homosexual men.
- These observations suggest possible metabolic alterations in the suprachiasmatic nucleus related to sexual orientation.
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