Troy Shinbrot shinbrot at nwu1.edu
Tue Mar 26 13:59:27 EST 1996

In article <4j94ma$vqg at netnews.upenn.edu>, nsimone at be.seas.upenn.edu
(Nicole L Simone) wrote:

> Hi!!
> I need to devise a device to that will prevent a tired driver from 
> getting into an accident.  I was wondering if anyone in neurophysioology 
> could explain to me the mechanics behind the eye and what happens when a 
> person is drowsy.  Does the movement of the eyelids change and can you 
> detect this with EMG, ECG etc.
> Thanks in advance for your help!
> --
> Nicki Simone 
> nsimone at eniac.seas.upenn.edu
> University of Pennsylvania
> Bioengineering Major
> Associate Scientist at Wistar Institute 
> (215)243-1191           

Well, there is hippus: the rhythmic oscillation of the pupil diameter. 
This occurs when you gaze ahead and relax sufficiently, but as far as I
know it's not an indicator of sleep per se.


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