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The fractal box dimension on human eyeball movement—objective, biological marker of schizophrenia?

Published online by Cambridge University Press:  16 April 2020

Tomasz Kleszczewski*
Affiliation:
Department of Biophysics, Medical University of Białystok, ul Mickiewicza 2 A, 15-230Białystok, Poland
Wiesław Rutkiewicz
Affiliation:
Psychiatric Hospital, Choroszcz, Poland
*
*Corresponding author. Tel.: +48-85-748-5667; fax: +48-85-746-8630. Email address: [email protected]
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Abstract

The authors developed a method of measuring the fractal box dimension of the human eyeball movement.We found a fractal property in schizophrenic subjects (n = 20) and normal controls (n = 20). The value of the fractal box dimension for schizophrenic patients differs from the results obtained in the control group.

Type
Rapid communication
Copyright
Copyright © European Psychiatric Association 2004

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References

Holzman, PS. Smooth-pursuit eye movements in schizophrenia: recent findings. Res Publ Assoc Res Nerv Ment Dis 1975;54:217–31.Google ScholarPubMed
Holzman, PSProctor, LRLevy, DLYasillo, NJMeltzer, HYHurt, SW.Eye-tracking dysfunctions in schizophrenic patients and their relatives. Arch Gen Psychiatry 1974;31(2):145–51.CrossRefGoogle ScholarPubMed
Hutton, SBJoyce, EMBarnes, TRKennard, C.Saccadic distractibility in first-episode schizophrenia. Neuropsychologia 2002;40(10):1729– 36.CrossRefGoogle ScholarPubMed
Kleszczewski, TSwiecicki, AKostrzewska, A.The measurement of luminance of light reflected from the human iris. Cell Mol Biol Lett 1996;1:303–9.Google Scholar
Kleszczewski, TRutkiewicz, WKleszczewska, EModzelewska, BSwiecicki, A.Metoda wyznaczania wymiaru pudełkowego dla ruchu gałki ocznej. In: XI Zjazd Polskiego Towarzystwa Fizyki Medycznej. Warszawa; 1999.Google Scholar
Kleszczewski, TRutkiewicz, WKleszczewska, EModzelewska, B.The fractal analysis of the eyeball movement in patients with diagnosed schizophrenia. In: World congress on medical physics and biomedical engineering. Chicago: Medical Physics; 2000.Google Scholar
Peitgen, H-OJurgens, HSaupe, D.Fractals for the classroom. Part 1: introduction to fractals and chaos. New York: Springer-Verlag; 1992.CrossRefGoogle Scholar
Rybakowski, JKBorkowska, A.Eye movement and neuropsychologi-cal studies in first-degree relatives of schizophrenic patients. Schizophr Res 2002;54(1-2):105–10.CrossRefGoogle ScholarPubMed
Ryu, HMorita, KShoji, YWaseda, YMaeda, H.Abnormal exploratory eye movements in schizophrenic patients vs. healthy subjects. Acta Neurol Scand 2001;104(6):369–76.CrossRefGoogle ScholarPubMed
Yokoyama, HNiwa, SItoh, KMazuka, R.Fractal property of eye movements in schizophrenia. Biol Cybern 1996;75(2):137–40.CrossRefGoogle Scholar
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