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Behavioral and biochemical studies in animals indicate that central dopaminergic neurotransmission may be modulated by sex steroids. This may be the mechanism underlying the suggested association between estrogen and schizophrenia. The aim was to examine if different levels of sex steroids during the menstrual cycle are associated with variations in D 2 dopamine receptor density as measured...
Assays in brain tissues from humans suffering from narcolepsy, and from genetically narcoleptic dogs have suggested that dopamine function may be disturbed in this condition. We have used the specific D2 receptor ligand N-(3-[ 18 F]fluoropropyl)-spiperone and positron tomography to study a group of 6 well-characterized medication-free, HLA-DR2 DRW15 DW6-positive narcoleptic patients...
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