Table 2.

Acute effects of posterior hypothalamic lesions on the inter-pulse intervals (IPI) and pulse amplitude of LHRH release

Groups	AM IPI (min)	PM IPI (min)	AM Amplitude (pg/ml)	PM Amplitude (pg/ml)
Lesions (N = 6)
15–17 months	137.7±35.1#	114.7±11.5	1.4±0.2	1.3±0.2
18–20 months	47.7±5.1**,a	51.2±1.6***,aa	3.4±1.0*,a	5.0±1.6*,a
21–24 months	55.0±5.2***,a	50.2±2.6***	5.1±1.3*,a	6.6±1.4**,a
25–29 months	49.6±2.9***	54.2±3.1***	8.6±3.1*	10.6±3.2*
30–3å4 months	56.4±2.1***	54.3±3.6***	7.4±2.6*	8.7±1.5**
> 35 months	44.5±3.3***	48.4±1.3***	11.6±5.0*	14.2±5.0*
Sham/controls (N=5)
15–17 months	135.7±16.8	99.2±15.6	1.3±0.3	1.2±0.1
18–20 months	132.0±30.9	122.0±23.1	1.5±0.3	1.8±0.8
21–24 months	115.2±19.4	73.2±9.1	2.0±0.3	1.8±0.8
25–29 months	71.8±8.6**	58.0±3.6*	2.1±0.4	4.8±1.4*
30–34 months	54.3±3.6***	51.1±5.1**	9.3±3.5*	15.7±3.5**
> 35 months	57.3±5.2***	47.5±3.6**	7.4±2.6*	17.1±4.5**

^#Mean±SEM

^*p<0.05 vs. 15–17 months;

^**p<0.01 vs. 15–17 months;

^***p<0.001 vs. 15–17 months (within group)

^ap<0.05 vs. sham/controls at corresponding age;

^aap<0.01 vs. sham/controls at corresponding age (between groups)