Table 3.

Eigenvalues and their associated percentages of variance for the initial and varimax rotated solutions for the Stage 1 PCA. The first four components retained for the Stage 2 analysis collectively are associated with approximately 55% of the total variance among all neurons.

	Initial PCA Extraction			Varimax Rotated PCA
Component	Eigenvalue	% of Variance	Cumulative % of Variance	(Rotated) Eigenvalue	% of Variance	Cumulative % of Variance
1	19.12	35.40	35.40	11.95	22.13	22.13
2	7.16	13.26	48.66	11.77	21.80	43.93
3	3.23	5.98	54.64	3.42	6.34	50.27
4	2.86	5.30	59.94	2.74	5.08	55.35
5	2.28	4.22	64.16	2.34	4.33	59.68
6	2.01	3.72	67.88	2.08	4.23	63.91
7	1.89	3.50	71.38	2.09	3.88	67.79
8	1.64	3.04	74.42	1.96	3.62	71.41
9	1.34	2.49	76.91	1.84	3.40	74.81
10	1.32	2.44	79.35	1.69	3.13	77.94
11	1.23	2.28	81.63	1.59	2.94	80.88
12	1.15	2.12	83.75	1.55	2.88	83.75