title: The labial photoplethysmograph: a new instrument for assessing genital hemodynamic changes in women.
abstract: OBJECTIVE
  The labial photoplethysmograph (LP), a new measure for assessing genital responses in women, was compared to the vaginal photoplethysmograph (VP).
  
  
  METHODS
  Fifteen women wore both devices simultaneously while viewing neutral, sexual, sexually-threatening, and threatening film clips.
  
  
  RESULTS
  The LP and VP exhibited comparable specificity to sexual stimuli. Additionally, the LP demonstrated greater resistance to movement artifacts and a slightly higher correspondence with subjective measures of sexual arousal.
  
  
  CONCLUSIONS
  The LP, while somewhat more difficult to place and less comfortable than the VP, is a promising new measure of genital response in women that warrants further development.
authors.affiliation: The Kinsey Institute for Research in Sex, Gender, and Reproduction, Indianna University, Bloomington, USA. nprause@indiana.edu
authors.forename: Nicole
authors.initials: N
authors.lastname: Prause
authors.forename: Jerome
authors.initials: J
authors.lastname: Cerny
authors.forename: Erick
authors.initials: E
authors.lastname: Janssen
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D001143:Arousal / Q000502:physiology*; D016477:Artifacts; D005260:Female; D006439:Hemodynamics; D006801:Humans; D017156:Photoplethysmography / Q000379:methods*; D012039:Regional Blood Flow; D015203:Reproducibility of Results; D019529:Sexuality / Q000502:physiology*; D014621:Vagina / Q000098:blood supply; D014844:Vulva / Q000098:blood supply*