Universität zu Köln

Chen, Qi, Weidner, Ralph ORCID: 0000-0002-4502-0166, Weiss, Peter H. ORCID: 0000-0002-5230-9080, Marshall, John C. and Fink, Gereon R. ORCID: 0000-0002-8230-1856 (2012). Neural Interaction between Spatial Domain and Spatial Reference Frame in Parietal-Occipital Junction. J. Cogn. Neurosci., 24 (11). S. 2223 - 2237. CAMBRIDGE: MIT PRESS. ISSN 0898-929X

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Abstract

On the basis of double dissociations in clinical symptoms of patients with unilateral visuospatial neglect, neuropsychological research distinguishes between different spatial domains (near vs. far) and different spatial reference frames (egocentric vs. allocentric). In this fMRI study, we investigated the neural interaction between spatial domains and spatial reference frames by constructing a virtual three-dimensional world and asking participants to perform either allocentric or egocentric judgments on an object located in either near or far space. Our results suggest that the parietal-occipital junction (POJ) not only shows a preference for near-space processing but is also involved in the neural interaction between spatial domains and spatial reference frames. Two dissociable streams of visual processing exist in the human brain: a ventral perception-related stream and a dorsal action-related stream. Consistent with the perception-action model, both far-space processing and allocentric judgments draw upon the ventral stream whereas both near-space processing and egocentric judgments draw upon the dorsal stream. POJ showed higher neural activity during allocentric judgments (ventral) in near space (dorsal) and egocentric judgments (dorsal) in far space (ventral) as compared with egocentric judgments (dorsal) in near space (dorsal) and allocentric judgments (ventral) in far space (ventral). Because representations in the dorsal and ventral streams need to interact during allocentric judgments (ventral) in near space (dorsal) and egocentric judgments (dorsal) in far space (ventral), our results imply that POJ is involved in the neural interaction between the two streams. Further evidence for the suggested role of POJ as a neural interface between the dorsal and ventral streams is provided by functional connectivity analysis.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Chen, Qi UNSPECIFIED UNSPECIFIED UNSPECIFIED Weidner, Ralph UNSPECIFIED orcid.org/0000-0002-4502-0166 UNSPECIFIED Weiss, Peter H. UNSPECIFIED orcid.org/0000-0002-5230-9080 UNSPECIFIED Marshall, John C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fink, Gereon R. UNSPECIFIED orcid.org/0000-0002-8230-1856 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-480575
DOI:	10.1162/jocn_a_00260
Journal or Publication Title:	J. Cogn. Neurosci.
Volume:	24
Number:	11
Page Range:	S. 2223 - 2237
Date:	2012
Publisher:	MIT PRESS
Place of Publication:	CAMBRIDGE
ISSN:	0898-929X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language FUNCTIONAL MAGNETIC-RESONANCE; CROSS-MODAL EXTINCTION; FAR SPACE; CORTICAL CONNECTIONS; MACAQUE MONKEY; PRIMATE HIPPOCAMPUS; VIEW CELLS; AREAS V6; TOOL USE; NEGLECT Multiple languages Neurosciences; Psychology, Experimental Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/48057