Effect of test duration on the visual-evoked potential (VEP) and alpha-wave responses.

ABSTRACT:

Primary objective

The purpose of this study was to assess the effect of test duration on the visual-evoked potential (VEP) and related alpha power spectrum measures.

Design and methods

Two conditions (eyes-closed and eyes-open) were tested using four different durations: 10, 20, 45, and 60 s. The Diopsys™ NOVA-TR system was used to obtain the visual-evoked potential (VEP) and extracted alpha wave with its related power spectrum. Sixteen visually normal, young-adult subjects (aged 22-25 years) participated in the experiment. The stimulus for the eyes-open condition consisted of a black-and-white, alternating checkerboard pattern with a small central fixation target. All trials were performed during one session.

Results

Regarding the VEP parameters, only variability of

SUBMITTER: Willeford KT 

PROVIDER: S-EPMC4096719 | biostudies-literature | 2013 Apr

REPOSITORIES: biostudies-literature