Response of the human vestibulo-ocular reflex system to constant angular acceleration. II. Experimental investigation.

The vestibulo-ocular reflex (VOR) response to a constant angular acceleration was investigated in a small group of subjects by varying the stimulus amplitude and the stimulus duration. Various parameters of the response were determined and compared with the results of the theoretical study. This form of stimulation yields a rather high value for the adaptation time constant Ta, which perhaps indicates that there is an adaptation gain of less than unity. This supposition is supported by finding of non-linearity within the VOR system at high stimulus amplitudes.