Neural adaptation for novel objects during dynamic articulation

Human observers readily identify objects with moving parts, and recognize their underlying structure even when the component parts undergo complex movement. This suggests the existence of neural representations that are invariant to motion and state of articulation, which together allow our visual s...

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Bibliographic Details
Published in:Neuropsychologia 2009-04, Vol.47 (5), p.1261-1268
Main Authors: Pyles, John A., Grossman, Emily D.
Format: Article
Language:English
Subjects:
Adaptation, Physiological
Anatomical correlates of behavior
Behavioral psychophysiology
Biological and medical sciences
Brain Mapping
Female
fMR-adaptation
fMRI
Fundamental and applied biological sciences. Psychology
Humans
Magnetic Resonance Imaging
Male
Movement
Object perception
Occipital Lobe - physiology
Pattern Recognition, Visual - physiology
Perception
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Reaction Time
Temporal Lobe - physiology
Ventral temporal cortex
Vision
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Summary:Human observers readily identify objects with moving parts, and recognize their underlying structure even when the component parts undergo complex movement. This suggests the existence of neural representations that are invariant to motion and state of articulation, which together allow our visual system to maintain ‘object constancy’. Ventral temporal cortex has previously been implicated in object perception and in coding object identity, but it is unclear where this is achieved when objects undergo motion-driven shape changes. In the present study, we use fMRI adaptation to probe the neural response properties when subjects view dynamic novel objects. Our results reveal neural selectivity for novel objects in the LOC region of the occipito-temporal lobe, even when those objects are viewed as moving and articulating. We also identify a bilateral area of posterior fusiform outside of the LOC with neural populations invariant to changes in the articulatory state of an object, a critical feature of object constancy. These results demonstrate the functional importance of ventral temporal cortex in the perception of moving objects, and the existence of neural populations coding for object constancy across movement and articulation.
ISSN:0028-3932
1873-3514
DOI:10.1016/j.neuropsychologia.2009.01.006