Table 2.

Percentages of Neurons in Laminae I-III That Were NPY-Immunoreactive

	Number of neurons counted	NPY-immunoreactive cells	% of neurons that were NPY- immunoreactive	% of neurons that are GABA- immunoreactive*	Estimated % of GABA neurons that contain NPY
I	97 (87 – 104)	5.7 (4 – 8)	5.8 (4 – 7.7)	24.8	23.4
II	192.3 (177 – 208)	10.7 (5 – 15)	5.4 (2.8 – 7.2)	31.3	17.3
III	165 (156 –177)	6.3 (4 – 8)	3.8 (2.5 – 4.5)	40.2	9.5

In each case the mean values for the three animals are shown, with the range in parentheses.

The percentages of neurons in each lamina that are GABA-immunoreactive are taken from the three naïve rats examined by Polgár et al. (2003).