Table 1.

The current status of awake craniotomy in Japanese institutes

1) Annual number of awake craniotomies (39 institutes responded to the survey)
	Under 10	26 (66.7%)
	10-30	8 (20.5%)
	Over 30	5 (12.8%)
2) Medical professionals that observe neurological findings (39 institutes responded to the survey; multiple answers possible)
	Surgeons	31 (79.5%)
	Speech therapists	24 (61.5%)
	Physical therapists	8 (20.5%)
	Occupational therapists	2 (5.2%)
	Clinical engineers	1 (2.6%)
	Nurses	1 (2.6%)
3) Electrophysiological monitoring during awake craniotomy (39 institutes responded to the survey; multiple answers possible)
	High-frequency (50-60 Hz) electrical stimulation mapping (cortex)	37 (94.9%)
	High-frequency (50-60 Hz) electrical stimulation mapping (white matter)	32 (82.1%)
	Electroencephalography	32 (82.1%)
	Motor-evoked potentials	29 (74.4%)
	Somatosensory-evoked potentials	20 (51.3%)
	Cortico-cortical-evoked potentials	2 (5.2%)