Table 1.

The number of FG-labeled DRG neurons innervating L5/6 facet joints in each rat in non-injured and injured groups, the number of FG-labeled and p55-IR DRG neurons innervating L5/6 facet joints in each rat in non-injured and injured groups

	L1	L2	L3	L4	L5	L6	Total
Number of FG labeled neurons innervating L5/6 facet joint
Non-injured group
Rat 1	4	8	4	4	5	7
2	6	16	9	7	11	6
3	4	9	8	5	12	7
4	5	11	11	8	3	6
5	7	12	12	9	9	5
6	5	17	10	9	6	8
7	7	14	7	4	5	9
8	5	12	4	6	8	11
9	4	13	5	6	6	8
10	3	12	10	7	8	10
Total	50	124	80	65	73	77	469
Injured group
Rat 11	5	12	5	7	7	4
12	7	21	6	9	8	5
13	8	15	7	7	18	3
14	9	16	9	5	5	7
15	4	19	5	5	5	8
16	5	9	21	4	4	8
17	8	7	3	12	7	5
18	6	8	5	15	12	6
19	4	20	8	11	18	11
20	5	11	7	8	11	7
Total	61	138	76	83	95	64	517
Number of FG labeled and p55-IR neurons innervating L5/6 facet joint
Non-injured group
Rat 1	0	0	0	0	0	0
2	1	2	0	2	1	2
3	0	2	1	1	2	1
4	0	1	1	0	1	3
5	0	2	2	2	1	0
6	0	0	2	1	2	0
7	1	1	1	1	0	0
8	2	2	0	1	1	1
9	0	2	0	1	2	1
10	2	3	0	1	2	1
Total	6	15	7	10	12	9	59
Injured group
Rat 11	3	10	3	3	3	2
12	5	12	3	3	3	2
13	5	13	3	2	4	2
14	7	10	2	4	2	3
15	3	15	4	2	2	3
16	3	5	3	1	3	2
17	2	5	2	5	4	2
18	5	6	3	5	4	3
19	2	12	3	3	4	3
20	3	8	3	3	4	2
Total	38	96	29	31	33	24	251