EEG Correlates of Relative Motion Encoding.
Brain Topogr
; 29(2): 273-82, 2016 Mar.
Article
em En
| MEDLINE
| ID: mdl-26515560
ABSTRACT
A large portion of the visual cortex is organized retinotopically, but perception is usually non-retinotopic. For example, a reflector on the spoke of a bicycle wheel appears to move on a circular or prolate cycloidal orbit as the bicycle moves forward, while in fact it traces out a curtate cycloidal trajectory. The moving bicycle serves as a non-retinotopic reference system to which the motion of the reflector is anchored. To study the neural correlates of non-retinotopic motion processing, we used the Ternus-Pikler display, where retinotopic processing in a stationary reference system is contrasted against non-retinotopic processing in a moving one. Using high-density EEG, we found similar brain responses for both retinotopic and non-retinotopic rotational apparent motion from the earliest evoked peak (around 120 ms) and throughout the rest of the visual processing, but only minor correlates of the motion of the reference system itself (mainly around 100-120 ms). We suggest that the visual system efficiently discounts the motion of the reference system from early on, allowing a largely reference system independent encoding of the motion of object parts.
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Base de dados:
MEDLINE
Assunto principal:
Córtex Visual
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Mapeamento Encefálico
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Estatística como Assunto
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Potenciais Evocados Visuais
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Movimento (Física)
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Percepção de Movimento
Limite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
Brain Topogr
Assunto da revista:
CEREBRO
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
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