ERP evidence for human early visual sensitivity to co-linearity compared to co-circularity.
Neurosci Lett
; 556: 46-51, 2013 Nov 27.
Article
in En
| MEDLINE
| ID: mdl-24103375
ABSTRACT
Our complex visual environment is constrained by natural geometric regularities, including spatiotemporal regularity, co-linearity and co-circularity. To investigate human visual processing associated with these regularities we directly compared the neural processes in encoding dynamic co-linearity and co-circularity using event-related potentials (ERPs). By recording ERPs to a target bar presented alone (no context) or in a dynamic sequence of bars following a co-linear or co-circular path, we observed earlier ERPs to targets embedded in co-linear sequence at early (66ms) and later stages (197ms) of post-target processing. In contrast, targets in co-circular sequence only modulated ERPs at later stages of processing. It is proposed that early visual processing may have adapted to efficiently process co-linearity to improve target identification, whereas sensitivity to co-circularity does not occur until later stages of processing. These results have significant impact for understanding brain-behaviour relationships when processing natural geometric regularities.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Visual Perception
/
Brain
/
Evoked Potentials, Visual
Type of study:
Diagnostic_studies
Limits:
Adolescent
/
Adult
/
Female
/
Humans
/
Male
Language:
En
Journal:
Neurosci Lett
Year:
2013
Document type:
Article