Abstract
Drowsiness causes fatal and heavily injured traffic accidents, therefore a number of studies on the detection of drowsiness or on the inhibition of it have conducted. In present study, electrocardiographic measurement which is one of the most convenient measurement methods for subjects and experimenters was chosen to detect of drowsiness. The variations of RR-Interval and autonomic nervous system indexes during mental arithmetic and driving vehicle were compared by employing frequency analysis and Lorenz plot as analysis method.
