Table 1. Demographic and clinical characteristics of patients with intraoperative somatosensory evoked potentials

No	Sex	Age	Diagnosis	Operation	Intraoperative SEP change	Post-op complications
1	M	47	Herniated cervical disc	Anterior spinal fusion	None	None
2	M	74	OPLL	Cervical laminoplasty	All, amp 50%↓lat 10%↑	None
3	M	62	Cervical myelopathy	Anterior spinal fusion	None	None
4	M	54	Cervical myelopathy	Posterior spinal fusion	None	None
5	M	64	Meningioma	Craniotomy of removal	None	None
6	M	66	Cervical myelopathy	Anterior spinal fusion	None	None
7	M	73	Herniated cervical disc	Anterior spinal fusion	None	None
8	F	55	Cerebral aneurysm	Clipping with aneurysm	None	None
9	M	42	Cerebral aneurysm	Clipping with aneurysm	None	None
10	M	48	Cervical myelopathy	Anterior spinal fusion	RL, amp 50%↓lat 10%↑	None
11	F	56	Cerebral aneurysm	Clipping with aneurysm	None	None
12	M	74	Cerebral aneurysm	Clipping with aneurysm	LU, amp 50%↓(short)	None
13	F	66	Cervical myelopathy	Anterior spinal fusion	None	None
14	F	58	Cerebral aneurysm	Clipping with aneurysm	None	None
15	F	44	Cervical myelopathy	Anterior spinal fusion	None	None

SEP: somatosensory evoked potentials; M: male; F: female; OPLL: ossification of the posterior longitudinal ligament; RL: right lower extremity; LU: left upper extremity.