Electronic sleep monitor headgear

Details Electronic sleep monitor headgear Electronic sleep monitor headgear

1987-07-08

1989-06-06

Howell, Lyle L.

Surgery

Truss

Pad

340575, 340576, A61B 510

Patent

active

048362190

ABSTRACT:
Electronic filters are applied to analog signals representative of eye movement and head movement, obtained from detectors attached to a simple headgear, to provide satisfactory information for automatically reporting an individual's sleep state. The filters determine whether there has been substantial eye and head movement in a given period. Each filter then generates binary output signals representing movement (or the absence of it). Noise filters and a comparison filter are then applied to the binary output signals to predict sleep state; REM sleep; NREM sleep; or wakefulness.

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Thomas et al., "Transducer for Recording Fine Eye Movement Through the Closed Eyelid"; Med. and Biol. Engr. and Comput., vol. 15, No. 6, 11-1977, pp. 705-706.
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Aaronson et al. (1982) Arch. Gen. Psychiatry 39:330-335.
Kayed et al. (1979) Sleep 2(2):253-260.
Hobson et al. (1978) Science 201:1251-1255.
Helfand et al. (1986) Psychophysiology 23(3):334-339.

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