Title :
Cardiovascular autonomic rhythms in spontaneous pupil fluctuations
Author :
Calcagnini, Giovanni ; Lino, S. ; Censi, F. ; Calcagnini, Giovanni ; Cerutti, S.
Author_Institution :
Dept. of Inf. & Syst. Sci., Rome Univ., Italy
Abstract :
The aim of this paper was to investigate the relationship between spontaneous pupil diameter fluctuations and autonomic rhythms of cardiovascular variability signals. ECG, Finapres and respiration data from 10 normal subjects were recorded simultaneously to spontaneous pupil diameter fluctuations obtained from a portable infrared TV pupillometer. Power spectra of pupillary fluctuations showed in all the subjects a respiratory component with significant spectral coherence with the high frequency components of the tachogram and systogram. Moreover a discrete power distribution in the low frequency band have been identified; coherence with LF power in tachograms and systograms was significant in 6/10 subjects. It is concluded that cardiovascular autonomic rhythms can be detected in spontaneous pupil diameter fluctuations
Keywords :
biocontrol; electrocardiography; eye; haemodynamics; infrared imaging; medical signal processing; neurophysiology; pneumodynamics; spectral analysis; ECG; Finapres data; cardiovascular autonomic rhythms; cardiovascular variability signals; central nervous system; discrete power distribution; high frequency components; low frequency band; portable infrared TV pupillometer; power spectra; respiration data; respiratory component; spectral coherence; spontaneous pupil diameter fluctuations; spontaneous pupil fluctuations; systogram; tachogram; Belts; Blood pressure; Cardiology; Electrocardiography; Fluctuations; Hafnium; Image sampling; Lighting; Rhythm; Spatial resolution;
Conference_Titel :
Computers in Cardiology 1997
Conference_Location :
Lund
Print_ISBN :
0-7803-4445-6
DOI :
10.1109/CIC.1997.647848
