Stability of the saccadic oculomotor system.
Biol Cybern
; 95(3): 281-7, 2006 Sep.
Article
em En
| MEDLINE
| ID: mdl-16847669
ABSTRACT
A variety of different types of instability has been found in the saccadic system of humans. Some of the instabilities correspond to clinical conditions, whereas others are inherent in the normal saccadic system. How can these instabilities arise within the mechanism of normal saccadic eye movements? A physiologically-based model of the saccadic system predicts that horizontal saccadic oscillations will occur with excessive mutual inhibition between the left and right burst cells and with underaction of the pause cells. The amplitudes and frequencies of the oscillations had ranges of 0-6 degrees and 6-20 cycles per second, respectively. Application of stability analysis techniques to the model reveals that development of the oscillations can be explained by the Hopf bifurcation mechanism. Future development of this approach will involve classifying pathological instabilities of the saccadic system according to the bifurcation involved in their generation.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Movimentos Sacádicos
/
Modelos Biológicos
/
Nervo Oculomotor
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Revista:
Biol Cybern
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Reino Unido