Evaluation of Acoustically Evoked Slow Vertex Response (SVR) Using Wireless Telemeter

Abstract

The auditory evoked slow vertex response (SVR) was examined using a wireless telemeter in 34 awake children with normal hearing between the ages of 2 and 6, and in 22 sleeping children using the conventional method (control study).
The results were as follows:
(1) Using a wireless telemeter, SVR was obtained in all awake subjects.
(2) The delectability of the responses in the awake state was better than in the sleeping state.
(3) In the awake state, SVR showed shorter latencies in accordance with the increase of sound intensity, while no relation was found in the sleeping state.
(4) The patterns of SVR in the awake children were highly variable and were not be tipified to a single form.
In the same subjects, however, test-retest modalities showed the quite similar patterns.
(5) Using this telemeter in the awake children, the rate of detection of false positivee response was 20.8%.
(6) The averaged power spectra of EEG were also examined with or without sound applied to the subjects, and no clear difference of the power spectra in each state was found.