Progesterone Withdrawal-Evoked Plasticity of Neural Function in the Female Periaqueductal Grey Matter

Table 1

Behavioural indices in open field test for rats in proestrus, late dioestrus, and after progesterone withdrawal. All values mean±SEM. Late dioestrus (LD, 𝑛=15), proestrus (Pro, 𝑛=22), high progesterone (HP, 𝑛=7).

Measure	Group
	LD	Pro	HP
Total distance travelled (cm)	3827±228	3737±205	4328±208
Average speed (cms^−1)	12.85±0.76	12.91±0.70	14.45±0.70
Time in central zone (%)	2.56±0.51	1.96±0.25	2.82±0.56
Time in middle zone (%)	10.00±1.98	7.74±1.42	6.75±0.94
Time in outer zone (%)	86.60±2.24	89.09±1.73	90.85±1.43
Number of central zone re-entries	4.25±0.64	4.10±0.62	3.57±0.57
Time rearing (%)	18.53±2.35	19.13±2.01	14.13±1.26
Time freezing (%)	0.30±0.30	0.54±0.44	n/a
Time grooming (%)	7.68±1.51	6.48±1.48	4.93±1.38