Parametric analysis of saccadic eye movement depending on vigilance states

The purpose of this study was to investigate the relationship between characteristic of saccadic eye movement and vigilance state. The authors surveyed this by comparing the waveform parameter of saccadic velocity to EEG parameter obtained from spectral power of /spl alpha/ and /spl beta/ wave band or to subjective vigilance states and sleepness. The authors' result showed that the shapes of saccadic velocity became blunt according to a decline in the vigilance state and also to a increase in sleepiness. This indicated the possibility for estimation of vigilance states by using characteristics of saccadic eye movement.