Before revision: The direct current signal , is a measure of vaginal blood volume (VBV) and reflects the total blood volume in the vaginal tissues.Hatch, J. P. [“Vaginal photoplethysmography: Methodological considerations”],”Archives of Sexual Behavior, 8, 357–374”, 1979 The alternating current signal is a measure vaginal pulse amplitude (VPA) and reflects the pressure change within the blood vessels of the vaginal wall associated with each heartbeat .
After revision: The direct current signal of is a measure of vaginal blood volume (VBV) and reflects the total blood volume in the vaginal tissues.Hatch, J. P. [“Vaginal photoplethysmography: Methodological considerations”],”Archives of Sexual Behavior, 8, 357–374”, 1979 The alternating current signal is a measure vaginal pulse amplitude (VPA) and reflects the pressure change within the blood vessels of the vaginal wall associated with each heartbeat .