U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Apparatus for detecting small involuntary movement

Patent 5365941 Issued on November 22, 1994. Estimated Expiration Date: Icon_subject June 16, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Head movement correction technique for eye-movement monitoring system
Patent #: 4582403
Issued on: 04/15/1986
Inventor: Weinblatt

Apparatus and method for noninvasive testing of voluntary and involuntary motor response patterns
Patent #: 4854329
Issued on: 08/08/1989
Inventor: Walruff

Method and means for detecting dyslexia
Patent #: 4889422
Issued on: 12/26/1989
Inventor: Pavlidis

Eye movement analyzing device utilizing pupil center-of-gravity data Patent #: 5070883
Issued on: 12/10/1991
Inventor: Kasahara

Inventors

Assignee

Application

No. 076047 filed on 06/16/1993

US Classes:

600/558Eye or testing by visual stimulus

Examiners

Primary: Hindenburg, Max

Attorney, Agent or Firm

Foreign Patent References

  • 0487855 EP. 06/12/1992
  • 09017705 WO 11/12/1991

International Class

A61B 013/00

Foreign Application Priority Data

1992-11-27 JP

Abstract

A target is presented on a board for calculation, eye movement of a subject while he is gazing at the target is detected by an eye movement detecting portion, the output of which is converted into a digital signal in a signal processing circuit and it is applied to a calculating portion. The calculating portion calculates small involuntary movement data in response to the input digital signal to find a value of a fractal dimension and time dependence of the fractal dimension to determine a disease related to brain function, and the output of determination is provided from an output portion such as a printer.

Other References

  • Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, vol. 13, No. 4/5, 3 Nov. 1991, Orlando, USA, pp. 1513-1515, H. Yoshimatsu et al., "High Dimensional Chaos of Miniature Eye Movements"
  • SMPTE Journal, vol. 95, No. 12, Dec. 1986, White Plaines, USA, pp. 1230-1241, M. Yamada et al., "Quantitative Evaluation of Eye Movements as Judged by Sight-Line Displacements"
  • N. B. Abraham, "Calculating the Dimension of Attractors from Small Data Sets", Feb. 24, 1986, pp. 217-221
  • W.N. Charman, "Fluctuations in Accommodation: A Review", Apr. 1988, pp. 153-164
  • Thomas C. Halsey, "Fractual Measures and their Singularities: The Characterization of Strange Sets", Feb. 1986, pp. 413-423
  • S.F. Stanten, "A Statistical Analysis of Pupil Noise", Jul. 1966, pp. 140-15
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