Progesterone Withdrawal-Evoked Plasticity of Neural Function in the Female Periaqueductal Grey
Matter
Figure 4
(a)
Baseline tail
flick latency in spontaneously cycling female Wistar rats in proestrus (Pro)
and late dioestrus (LD) and in rats undergoing progesterone treatment (HP) or
withdrawal from an exogenous progesterone dosing regime (PWD). Data show mean values of three readings taken at 5-minute
intervals. All values . Pro: , LD: , HP: , PWD: . (b) Change in tail flick latency (TFL)
following 5-minute exposure to nonnoxious vibration stress in normally cycling
and progesterone-withdrawn female Wistar rats. Data represent mean values
obtained during 10 minutes immediately poststress as a percentage of the mean baseline level
measured during 10 minutes prior to the stress. A control group comprising rats
in proestrus and late dieostrus received no vibration stress. All values ; no stress (control): , Pro: , LD: , HP: , PWD: . ,
post hoc Dunnett’s test in comparison to control group after significant ()
one-way ANOVA.