TABLE 1:

Preoperative characteristics of eight patients who underwent craniocervical decompression

Patient (No.)	Occipital Headache	Valsalva-Induced Headache	Motor	Sensory	Cranial Nerve Dysfunction	Syrinx	Caudad Pre-op	Cephalad Pre-op
1 J B	+	+	0	0	+	0	1.5	3
2 T C	+	+	0	+	0	0	1.8	3.8
3 A Z	+	0	+	+	+	0	2	2.5
4 J S	+	+	+	0	0	yes	3.3	3.3
5 N A	+	+	0	0	+	yes	3.4	14.2
6 J P	+	+	+	+	0	yes	3.5	4.5
7 C T	0	0	0	+	+	yes	4.5	8.9
8 M S	+	0	+	+	+	0	7.3	14.6