Motion standstill leads to activation of inferior parietal lobe

Federspiel, Andrea; Volpe, Umberto; Horn, Helge; Dierks, Thomas; Franck, Anders; Vannini, Patrizia; Wahlund, Lars-Olof; Galderisi, Silvana; Maj, Mario (2006). Motion standstill leads to activation of inferior parietal lobe. Human brain mapping, 27(4), pp. 340-9. Hoboken, N.J.: Wiley-Blackwell 10.1002/hbm.20189

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Previous studies on motion perception revealed motion-processing brain areas sensitive to changes in luminance and texture (low-level) and changes in salience (high-level). The present functional magnetic resonance imaging (fMRI) study focused on motion standstill. This phenomenon, occurring at fast presentation frequencies of visual moving objects that are perceived as static, has not been previously explored by neuroimaging techniques. Thirteen subjects were investigated while perceiving apparent motion at 4 Hz, at 30 Hz (motion standstill), isoluminant static and flickering stimuli, fixation cross, and blank screen, presented randomly and balanced for rapid event-related fMRI design. Blood oxygenation level-dependent (BOLD) signal in the occipito-temporal brain region MT/V5 increased during apparent motion perception. Here we could demonstrate that brain areas like the posterior part of the right inferior parietal lobule (IPL) demonstrated higher BOLD-signal during motion standstill. These findings suggest that the activation of higher-order motion areas is elicited by apparent motion at high presentation rates (motion standstill). We interpret this observation as a manifestation of an orienting reaction in IPL towards stimulus motion that might be detected but not resolved by other motion-processing areas (i.e., MT/V5).

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy > Psychiatric Neurophysiology [discontinued] 04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy > UPD Murtenstrasse
UniBE Contributor:	Federspiel, Andrea, Horn, Helge Joachim, Dierks, Thomas
ISSN:	1065-9471
ISBN:	16108019
Publisher:	Wiley-Blackwell
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 14:49
Last Modified:	05 Dec 2022 14:15
Publisher DOI:	10.1002/hbm.20189
PubMed ID:	16108019
Web of Science ID:	000236093700007
URI:	https://boris.unibe.ch/id/eprint/20498 (FactScience: 3970)