de.mpg.escidoc.pubman.appbase.FacesBean
Deutsch
 
Hilfe Wegweiser Impressum Kontakt Einloggen
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Poster

Cue-invariant 3-D shape representation in monkey cortex using fMRI

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons84209

Sereno,  M
Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons83787

Augath,  M
Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons84063

Logothetis,  NK
Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society;

Externe Ressourcen
Es sind keine Externen Ressourcen verfügbar
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Sereno, M., Augath, M., & Logothetis, N. (2002). Cue-invariant 3-D shape representation in monkey cortex using fMRI. Poster presented at 32nd Annual Meeting of the Society for Neuroscience (Neuroscience 2002), Orlando, FL, USA.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0013-DE7B-6
Zusammenfassung
Previous work using fMRI in anesthetized monkeys investigating the representation of 3-D objects defined by moving random dots or static texture cues revealed the presence of a network of areas responsive to 3-D shape in occipital, temporal, parietal, and frontal cortex (Sereno et al., Neuron, 2002). The goal of the present study was to determine the amount of activation overlap for 3-D surface shape defined with 3 different cues by directly comparing activation for the same 3-D shapes in the same scanning session. Stimuli consisted of a set of 3-D surfaces defined by dynamic (random dots with motion parallax) and static (shading and contour) shape cues. Each shape defined by a particular cue was paired with a control stimulus consisting of a scrambled or disrupted cue gradient. The control stimuli contain the same local information as the original surfaces (motion--dot speed and direction; shading--luminance range and pattern; surface contour--line shape and size). However, the disruption of the cue gradient across the image diminishes or abolishes an impression of depth. Activation from a comparison of intact to control stimuli revealed regions of common activation (e.g., in superior temporal, intra-parietal, and arcuate sulci) for shape defined by the 3 different cues. Our results suggest a set of candidate areas in monkey cortex for cue-invariant 3-D shape processing.