Table 2. Clinical findings.

Case	Disease	Age/Sex	Sensory disturbance				TTR
			UE (C7area) UE (C6 area) UE (C6 area)			LE
			Numbness	Pain sense	Tactile sense	Tactile sense
1	CSA	43/F	+	N	N	N	↑
2	OPLL	43/M	+	+	N	N	N
3	CSA	51/M	+	+	N	N	N
4	CSM	51/M	+	+	N	+*	↑
5	CSM	84/M	+	+	+	+*	↑
6	CSM	76/M	+	+	N	+*	↑
7	CSM	68/F	+	+	+	N	↑
8	OPLL	76/M	+	+	+	N	↑
9	CSM	61/F	+	+	+	N	↑
10	CSM	70/M	+	+	+	N	↑
11	CLF	80/F	+	+	+	N	↑
12	CDH	63/M	+	+	N	+	↑
13	CDH	63/F	+	+	+	+	↑
14	CSM	74/M	+	+	+	+	↑
15	CSA	62/M	+	+	+	N	↑
16	CSM	68/F	+	+	+	+	↑
17	OPLL	79/M	+	+	+	+	↑
18	CSM	74/F	+	+	+	+	↑
19	CSA	74/M	+	+	+	+	↑
20	CSM	72/M	+	+	+	+	↑
21	CSM	75/M	+	+	+	+	↑
22	OPLL	67/M	+	+	+	+	↑
23	CDH	67/M	+	+	+	+	↑
24	OPLL	54/M	+	+	+	+	↑
25	OPLL	83/M	+	+	+	+	↑
26	CSM	86/M	+	+	+	+	↑
27	OPLL	49/F	+	+	+	+*	↑
28	CSM	74/M	+	+	+	+*	↑
29	CSM	73/M	+	+	+	+	↑
30	CSM	85/M	+	+	+	+*	↑
31	OPLL	81/M	+	+	+	+	N
32	OPLL	59/F	+	+	+	+	↑
33	CSM	67/F	+	+	+	+	↑
34	CSM	71/F	+	+	+	+	↑
35	CSM	71/F	+	+	+	+	↑
36	CDH	80/F	+	+	+	+	↑

Area of numbness and sensory disturbance: according to the dermatome proposed by Brain. CSA: cervical spondylotic amyotrophy, CSM: cervical spondylotic myelopathy, OPLL: ossification of posterior longitudinal ligament, CDH: cervical disc herniation, CLF: calcification of ligamentum flavum, M: male, F: female, UE: upper extremities, LE: lower extremities, TTR: triceps tendon reflex, ↑: hyper-reflex, N: normal.

*Six patients (case 4, 5, 6, 27, 28, and 30) with ossification of the posterior longitudinal ligament (OPLL) in the thoracic spine and/or postoperative history in the lumbar spine.