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Investigation of Nonlinear Pupil Dynamics by Recurrence Quantification Analysis
Joint Authors
Mesin, L.
Monaco, A.
Cattaneo, R.
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-09-26
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Pupil is controlled by the autonomous nervous system (ANS).
It shows complex movements and changes of size even in conditions of constant stimulation.
The possibility of extracting information on ANS by processing data recorded during a short experiment using a low cost system for pupil investigation is studied.
Moreover, the significance of nonlinear information contained in the pupillogram is investigated.
We examined 13 healthy subjects in different stationary conditions, considering habitual dental occlusion (HDO) as a weak stimulation of the ANS with respect to the maintenance of the rest position (RP) of the jaw.
Images of pupil captured by infrared cameras were processed to estimate position and size on each frame.
From such time series, we extracted linear indexes (e.g., average size, average displacement, and spectral parameters) and nonlinear information using recurrence quantification analysis (RQA).
Data were classified using multilayer perceptrons and support vector machines trained using different sets of input indexes: the best performance in classification was obtained including nonlinear indexes in the input features.
These results indicate that RQA nonlinear indexes provide additional information on pupil dynamics with respect to linear descriptors, allowing the discrimination of even a slight stimulation of the ANS.
Their use in the investigation of pathology is suggested.
American Psychological Association (APA)
Mesin, L.& Monaco, A.& Cattaneo, R.. 2013. Investigation of Nonlinear Pupil Dynamics by Recurrence Quantification Analysis. BioMed Research International،Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-1004275
Modern Language Association (MLA)
Mesin, L.…[et al.]. Investigation of Nonlinear Pupil Dynamics by Recurrence Quantification Analysis. BioMed Research International No. 2013 (2013), pp.1-11.
https://search.emarefa.net/detail/BIM-1004275
American Medical Association (AMA)
Mesin, L.& Monaco, A.& Cattaneo, R.. Investigation of Nonlinear Pupil Dynamics by Recurrence Quantification Analysis. BioMed Research International. 2013. Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-1004275
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1004275