title: Effect of estradiol versus estradiol and testosterone on brain-activation patterns in postmenopausal women.
abstract: OBJECTIVE
  To determine the effect of estradiol and testosterone on brain-activation patterns in surgically postmenopausal women viewing erotic video clips using functional magnetic resonance imaging.
  
  
  METHODS
  Six women, who had undergone a bilateral oophorectomy and hysterectomy for benign disease, viewed erotic and neutral videos during functional magnetic resonance imaging while not on hormone therapy, while on estradiol therapy, and while on estradiol and testosterone therapy. Five similarly aged premenopausal women viewed the same videos. Areas of brain activation between the functional magnetic resonance imaging scans of both groups of women were compared with determine whether agonadal serum levels of sex hormones and administration of estradiol and testosterone impacted brain patterns of sexual arousal.
  
  
  RESULTS
  When compared with premenopausal women, untreated postmenopausal women had significantly decreased areas of brain activation during both erotic and neutral stimulations. Administration of estradiol increased global brain-activation patterns during both visual stimulations, with erotic video viewing causing a limited increase in limbic system activation. Combined estradiol and testosterone therapy was associated with a greater activation of the central nervous system, with more limbic system activated during the erotic video. Brain-activation patterns of the postmenopausal women were similar to the premenopausal group only during the estradiol and testosterone treatment phase.
  
  
  CONCLUSIONS
  Agonadal serum hormone levels result in globally decreased brain-activation patterns in postmenopausal women while viewing neutral and erotic videos. Administration of both estradiol and testosterone increase global brain activation, and both sex steroids are independently associated with enhanced limbic system response during erotic visual stimulation.
authors.affiliation: Department of Obstetrics and Gynecology, Reproductive Medicine Center, University of Minnesota, Minneapolis, MN 55454, USA. arche051@umn.edu
authors.forename: Johanna S
authors.initials: JS
authors.lastname: Archer
authors.forename: Tracy E
authors.initials: TE
authors.lastname: Love-Geffen
authors.forename: Kathryn L
authors.initials: KL
authors.lastname: Herbst-Damm
authors.forename: David A
authors.initials: DA
authors.lastname: Swinney
authors.forename: Jeffrey R
authors.initials: JR
authors.lastname: Chang
mesh_terms: D000328:Adult; D001143:Arousal / Q000187:drug effects*; D001921:Brain / Q000187:drug effects* / Q000473:pathology; D001931:Brain Mapping; D004958:Estradiol / Q000008:administration & dosage / Q000097:blood / Q000494:pharmacology*; D015914:Estrogen Replacement Therapy; D005260:Female; D020249:Hormone Replacement Therapy; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D010865:Pilot Projects; D017698:Postmenopause; D013739:Testosterone / Q000008:administration & dosage / Q000097:blood / Q000494:pharmacology*; D014741:Video Recording
chemical_list: D013739:Testosterone; D004958:Estradiol