Method and device for determining a subject's sleep state by pro

Details Method and device for determining a subject's sleep state by pro Method and device for determining a subject's sleep state by pro

1991-01-24

1992-10-13

Kamm, William E.

Surgery

Truss

Pad

36441305, A61B 50476

Patent

active

051541807

ABSTRACT:
An electroencephalographic signal processing method allows the stages of sleep to be determined in real time as an EEG signal is being picked up. The EEG signal is divided into time segments of the same length; each signal segment is sampled digitally to obtain successive blocks of N samples; for each block i, M standardized correlation coefficients R.sub.i,k are determined, M being much far smaller than N; for each block i, the distances D(i,j) between the coefficients R.sub.i,k of the current block and the coefficients R.sub.j,k of the centers of gravity of existing classes j are calculated; the minimum D(i,p) of distances D(i,j) is selected; block i is assigned to class p and the center of gravity of the class is updated if D(i,p) is below a given threshold, while a new class is created if D(i,p) is above the given threshold; and each class is assigned to the closest stage from the standpoint of energy distribution beween frequency bands.

REFERENCES:
patent: 4201224 (1980-05-01), John
patent: 4214591 (1980-07-01), Sato et al.
patent: 4616333 (1986-10-01), Shimoni
patent: 4979110 (1990-12-01), Albrecht et al.
patent: 4999772 (1991-03-01), Bowman et al.
Lacroix et al., "New Algorithms for On-Line Automatic Sleep Scoring, and Their Application to Mini and Micro-Computer", Journal A, vol. 26, No. 2, Apr. 1985 pp. 91-97.
Rosenfalck et al., "On-Line Analysis of EEG", IEEE/Engineering in Medicine and Biology Society, pp. 418-422.
Principe, "SAMICOS--A Sleep Analyzing Microcomputer System" IEEE Transactions on Biomedical Engineering, vol. BME-33, No. 10, Oct. 1986, pp. 935-941.

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