Table 1. Summary of psychophysical and physiological tests carried out in different cohorts.

	Tactile Acuity	Vibrotactile Sensitivity	Hearing Acuity	Otoacoustic Emissions	Baroreflex Function	Temperature Sensitivity	Heat Pain Threshold
Twins	191	187	176	146	176	190	188
Additional controls	151	99	—	42	—	—	—
Blind	57	18	—	—	—	—	—
Congenitally hearing impaired	39	29	—	—	—	—	—
Usher syndrome affected	65	61	—	—	19	51	50
Total	503	394	176	188	195	241	238