Statistical properties of simultaneously recorded fluctuations in pupil diameter and heart rate

Author

Yoshida, H. ; Mizuta, H. ; Gouhara, T. ; Suzuki, Y. ; Yana, K. ; Okuyama, F.

Author_Institution

Dept. of Electron. Syst. & Inf. Eng., Kinki Univ., Wakayama, Japan

Volume

1

fYear

1995

fDate

20-25 Sep 1995

Firstpage

165

Abstract

Describes the relationship between fluctuations in pupil diameter (PD) and heart rate (HR). Simultaneous recording of PD, HR and instantaneous lung volume (ILV) has been made for ten normal healthy subjects. The spectral analysis showed that the cross phase spectrum between PD and HR fluctuations had a constant value -π/2 over fairly long frequency range (0.1-0.4 Hz). In addition to this, the authors have observed that the power spectrum of the PD fluctuations showed 1/f³ spectral pattern in the frequency range while the power spectrum of HR variability showed 1/f spectral pattern. This findings implies that HR variability is associated with the derivative of PD fluctuations and may be important for the characterization of PD fluctuations as an index to measure autonomic nervous activity

Keywords

diameter measurement; electrocardiography; eye; medical signal processing; spectral analysis; statistical analysis; 0.1 to 0.4 Hz; 1/f spectral pattern; ECG recordings; autonomic nervous activity measurement; cross phase spectrum; electrodiagnostics; heart rate; instantaneous lung volume; normal healthy subjects; pupil diameter; simultaneously recorded fluctuations; statistical properties; Biomedical engineering; Biomedical informatics; Electrocardiography; Eyes; Fluctuations; Frequency estimation; Heart rate; Hospitals; Spectral analysis; Systems engineering and theory;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1995., IEEE 17th Annual Conference

Conference_Location

Montreal, Que.

Print_ISBN

0-7803-2475-7

Type

conf

DOI

10.1109/IEMBS.1995.575052

Filename

575052