A multidimensional model of the effect of gravity on the spatial orientation of the monkey.
J Vestib Res
; 3(2): 141-61, 1993.
Article
em En
| MEDLINE
| ID: mdl-8275250
ABSTRACT
A "sensory conflict" model of spatial orientation was developed. This mathematical model was based on concepts derived from observer theory, optimal observer theory, and the mathematical properties of coordinate rotations. The primary hypothesis is that the central nervous system of the squirrel monkey incorporates information about body dynamics and sensory dynamics to develop an internal model. The output of this central model (expected sensory afference) is compared to the actual sensory afference, with the difference defined as "sensory conflict." The sensory conflict information is, in turn, used to drive central estimates of angular velocity ("velocity storage"), gravity ("gravity storage"), and linear acceleration ("acceleration storage") toward more accurate values. The model successfully predicts "velocity storage" during rotation about an earth-vertical axis. The model also successfully predicts that the time constant of the horizontal vestibulo-ocular reflex is reduced and that the axis of eye rotation shifts toward alignment with gravity following postrotatory tilt. Finally, the model predicts the bias, modulation, and decay components that have been observed during off-vertical axis rotations (OVAR).
Palavras-chave
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Percepção Espacial
/
Gravitação
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
J Vestib Res
Assunto da revista:
OTORRINOLARINGOLOGIA
Ano de publicação:
1993
Tipo de documento:
Article