Chaos theory applied to the vestibular system

 

Torbjorn Aasen, M.Sc.
Departement of Otolaryngology /
Head & Neck Surgery
Haukeland University Hospital
Norway
+47-55 97 26 75


RESEARCH

- Chaos theory applied to the vestibular system
- The influence of diving on the vestibular system.
- Effects of hyper- and hypobaric conditions on postural control
- Oculo-sensomotoric testing and ME-patients.


Signals from the vestibular system


nystagmus.gif (24358 bytes)

 

- Caloric nystagmus-signal

- Optokinetic nystagmus-signal


Papers

Aasen T. Symbolic Dynamics Applied to Optokinetic Nystagmus Signals. Journal of Medical Engineering & Technology, 2003; 27, 4, 145-148.

Aasen T. Chaos theory applied to the caloric response of the vestibular system. Computers and Biomedical Research 26, 556-567 (1993).

Aasen T, Kugiumtzis D, Nordahl SHG. Procedure for Estimating the Correlation Dimension of Optokinetic Nystagmus Signals. Computers and Biomedical Research 30, 95 (1997).

Nordahl SHG, Aasen T, Risberg J, Molvær OI. Balance Testing and Doppler Monitoring During Hyperbaric Exposure. Aviat Space Environ Med 2003;74(4):320-325.

Nordahl SHG, Aasen T,  Risberg J, Owe JO, Molvær OI, Postural Control  and Venous Gas Bubble. Formation During Hypobaric Exposure. Aviat Space Environ Med 2002;73:184-190.

Aasen T, Kugiumtzis D, Nordahl SHG. Analysis of time-sampled data of optokinetic nystagmus with nonlinear methods. Poster at International Workshop on Nonlinear Dynamics, Fractality, and Selforganization of Complex Systems. Würzburg, Tyskland, 1-3 october, 1994.

Aasen T, Nordahl SHG, Molvær OI., Olofsson J. Kaosteori i otonevrologisk diagnostikk. Nor Med 1997; 112:352-5.. Abstract: English version,  Norwegian version.

Nordahl SHG, Aasen T, Owe JO, Dyrkorn BM, Eidsvik S, Molvær OI. Static Stabilometry and Repeated Testing in a Normal Population, Aviation, Space and Enviromental Medicine 71: 889-93; 2000.

Nordahl SHG, Aasen T, Molvær OI. Fractal Analysis of ENG-signals. Correlation Dimension Analysis. Proceedings, Acta Otolaryngol (Stockh). Accepted.

Nordahl SHG, Aasen T, Owe JO, Molvær OI. Effects of hypobaric hypoxia on postural control. Aviation, Space and Enviromental Medicine 69 (6): 590-5; 1998.

Nordahl SHG, Aasen T, Molvær OI. Balance Testing by Stabilometry in Diving. AURORA´93, Dive Report, National Hyperbaric Centre, Aberdeen, UK. 1993;2:141-6.

Nordahl SHG, Aasen T, Molvær OI. Balance testing by stabilometry in saturation diving. Proceedings EUBS 1994, XXth Annual Meeting of the European Underwater and Baromedical Society. Istanbul. 1994 (ISBN:975-7958-00-x): 500-4.

Nordahl SHG, Aasen T, Molvær OI. Balance testing in saturation diving. Aviation Space and Enviromental Medicine 66 (10); 1995. Abstract

Nordahl SHG, Aasen T, Owe JO, Molvær OI. Effects of hypobaric hypoxia on postural control. XVI World Congress of Otorhinolaryngology Head and Neck Surgery. Sydney, Australia 2-7 March 1997.

Nordahl SHG, Aasen T, Molvær OI. Otonevrologi. Forhandlinger NOLF, feb.1993;152:47-61.

Nordahl SHG, Aasen T, Molvær OI. Vestibular Testing Pre- and Post Dive. AURORA´93, Dive Report, National Hyperbaric Centre, Aberdeen, UK. 1993; 2: 147-50.

Aasen T, Nordahl SHG, Molvær OI. Kaosteori og dens applikasjon innen otonevrologi. Forhandlinger NOLF, feb.1993; 152: 63-9.


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