Table 1.

The effects of clonidine and training on the mean amplitude of responses in the specified pathway and on occurrence of reversals

	Sham			Trained
	No drug	Clonidine	Effect	No drug	Clonidine	Effect
Effect of clonidine
Monosynaptic excitation	2.55	2.69		1.65	1.66
Disynaptic inhibition	−3.01	−2.09	↓30.5%	−2.75	−1.07	↓61.0%
Polysynaptic excitation	0.09	0.60	↑535.6%	0.17	0.68	↑307.8%
Occurrence of reversals	8 of 94	12 of 40	↑21.5%	9 of 103	30 of 77	↑30.2%

	Without drug			With clonidine
	Sham	Trained	Effect	Sham	Trained	Effect
Effect of training
Monosynaptic excitation	2.55	1.65		2.69	1.66
Disynaptic inhibition	−3.01	−2.75		−2.09	−1.07	↓48.7%
Polysynaptic excitation	0.09	0.17		0.60	0.68
Occurrence of reversals	8 of 94	9 of 103		12 of 40	30 of 77

Only statistically significant changes are indicated.