The nystagmus threshold in turning test in different age groups and in patients suffering from otosclerosis.

The threshold of nystagmus during angular acceleration and deceleration was investigated in two series of healthy persons with an average age of 20 and 42 years and in series of otosclerotic patients with an average age of 42 years. It was shown that age as such does not influence the thresholds, but a lesion in the inner ear, such as otosclerosis, causes higher thresholds even in younger subjects.