Title: Distinct neuronal effects of perspective and hand grip on paired-object affordance: an fMRI study
Abstract: Event Abstract Back to Event Distinct neuronal effects of perspective and hand grip on paired-object affordance: an fMRI study Melanie Wulff1*, Glyn W. Humphreys2 and Pia Rotshtein1 1 University of Birmingham, School of Psychology, UK 2 University of Oxford, Department of Experimental Psychology, UK Attention is facilitated when two objects afford a mutual action (paired-object affordance). Additional cues like viewing object pairs from a 1st-person (1PP) rather than from a 3rd-person perspective (3PP) and gripping the objects with the correct hand (vs. the incorrect hand) also boost attention and perceptual effects. Two processes might mediate paired-object affordance: visual-based affordance (the position of the objects and perspective) and motor-based affordance (hand grip information). The study aimed to examine the neural correlates of the paired-object affordance effect. Eleven right-handed subjects (Mage = 65.09; SD = 12.14) performed a one-back task while viewing objects pairs congruently grasped for action or not, presented from a 1PP or 3PP and positioned for action or not. The repetition stimuli were modelled separately in the fMRI design. Imaging data were acquired using a 3T Philips Achieva scanner. We used a random effects analysis (SPM8). Visual-based affordance: bilateral parietal and ventral regions (right STG) responded more strongly when objects were positioned for action, while activation in the left postcentral gyrus and bilateral calcarine was stronger for 1PP than for 3PP stimuli. Interestingly, interactions between the two visual-based cues were also evident, as effects of action relation were stronger for 1PP stimuli on most of these clusters. Motor-based affordance: stronger responses were observed in the right SMA, right hippocampus and the left cerebellum when the active object was held in the left hand (normally the incongruent hand position for right-handed subjects) compared to when it was held in the right hand. Motor-based affordance effects within the SMA and temporal regions were also stronger for pairs presented from a 1PP, suggesting an interaction between visual- and motor-based affordance cues within these regions. The results showed that paired-object affordance is mediated by two distributed but interacting neuronal networks. Keywords: Attention, fMRI, handedness, perspective, affordance, Action relation Conference: XII International Conference on Cognitive Neuroscience (ICON-XII), Brisbane, Queensland, Australia, 27 Jul - 31 Jul, 2014. Presentation Type: Poster Topic: Attention Citation: Wulff M, Humphreys GW and Rotshtein P (2015). Distinct neuronal effects of perspective and hand grip on paired-object affordance: an fMRI study. Conference Abstract: XII International Conference on Cognitive Neuroscience (ICON-XII). doi: 10.3389/conf.fnhum.2015.217.00343 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 19 Feb 2015; Published Online: 24 Apr 2015. * Correspondence: Mrs. Melanie Wulff, University of Birmingham, School of Psychology, Birmingham, UK, [email protected] Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Melanie Wulff Glyn W Humphreys Pia Rotshtein Google Melanie Wulff Glyn W Humphreys Pia Rotshtein Google Scholar Melanie Wulff Glyn W Humphreys Pia Rotshtein PubMed Melanie Wulff Glyn W Humphreys Pia Rotshtein Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.