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

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Poster

Biological motion processing in the macaque-fMRI

MPG-Autoren
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

Krekelberg, B., Augath, M., & Logothetis, N. (2002). Biological motion processing in the macaque-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-DE6F-2
Zusammenfassung
Psychophysical and imaging studies in humans have demonstrated specialized mechanisms for the detection of biological motion. Studies in humans, however, are limited in the details of these mechanisms they can reveal. We used functional MRI in the anaesthetized macaque to identify the brain areas involved in the analysis of biological motion and thereby provide electrode-guidance to study these mechanisms in more detail. We used a human point-light walker and a scrambled walker. The latter has identical local motion signals to the intact walker, but its local signals do not combine to a figure of a walking human. In a block-design we alternated these stimuli with periods of no visual stimulation. We recorded the BOLD response in a 4.7T vertical scanner (Bruker, Inc) using gradient-recalled multi-shot multi-slice EPI sequences. 21 horizontal slices covered the whole brain. Voxels were 1x1x2mm, TE =20ms, TR=1058ms. The data were analysed in BrainVoyager (BrainInnovation, Inc). Both the intact walker and the scrambled walker significantly activated early visual areas V1, V2 and the motion areas V3 and MT. More interestingly, we also found activation of areas commonly associated with form analysis such as V4 and the mid-anterior STS. Apparently, these areas are equipped with the neural mechanisms to detect the typical pendular movement associated with biological motion. In our setup, however, the intact walker never activated these areas significantly more than the scrambled walker.