Table 2. Patients in the non-lesional EP group

Age (y)	Sex	Aneurysm feature			IONM findings			Radiologic finding	mRS
		Location	Size (mm)	TC (min)	Suspected event	Deterioration pattern	Rate of change		Postoperative	At 1 month
51	F	Left MCA	5	No	Dura opening	Non-lesional side TA-MEP	Gradual	Unremarkable	0	0
57	F	Left MCAB	5	9	TC	Non-lesional side median SSEP to lesional side TA-MEP	Rapid	Unremarkable	0	0
70	F	Left ICA	3.5	No	PC	Non-lesional side FCR- and APB-MEPs to diffuse bilateral MEPs and SSEPs	Rapid	Postoperative SAH	2	0
55	M	Left MCAB	4.5	No	PC	Non-lesional side TA-MEP to bilateral TA-MEPs and median SSEPs	Rapid	Vasospasm	0	0
71	M	Right MCAB	4	No	Dura opening	Non-lesional side FCR- and TA-MEPs	Rapid	Unremarkable	0	0
54	F	Left MCAB	2	No	Dura opening	Non-lesional side AH-MEP	Gradual	Unremarkable	0	0
61	F	Left MCAB	3.5	No	PC	Non-lesional side median SSEP to bilateral median SSEPs	Gradual	Vasospasm	0	0
38	F	Right MCAB	2.7	No	PC	Non-lesional side median SSEP	Rapid	Unremarkable	0	0
71	F	Left MCAB	1.1	No	PC	Non-lesional side median SSEP	Gradual	Unremarkable	0	0

IONM: intraoperative neurophysiological monitoring; mRS: modified Rankin scale; TC: temporary clipping; F: female; MCA: middle cerebral artery; TA: tibialis anterior; MEP: motor evoked potentials; MCAB: middle cerebral artery bifurcation; SSEP: somatosensory evoked potentials; ICA: internal carotid artery; PC: permanent clipping; FCR: flexor carpi radialis; APB: abductor pollicis brevis; SAH: subarachnoid hemorrhage; M: male; AH: abductor hallucis.