A Neuronavigated TMS Investigation of the Functional Chronometry of V5 and Middle and Posterior Intraparietal Sulcus in Motion-Driven Attention
-
1
La Trobe University, School of Psychological Science, Australia
-
2
Swinburne University of Technology, Faculty of Life and Social Sciences, Australia
Visuospatial motion processing is a rapid and behaviourally critical function which engages networks of rapidly activated areas including motion area V5, and spatial attention related areas in parietal cortex. The current experiment sought to investigate the functional chronometry of area V5, mIPS, and pIPS, based on individual fMRI in the performance of a Motion-Driven Attention task. It was hypothesized that stimulation of these regions would lead to decreased performance early after motion onset, and then again at approximately 150 ms. Nine participants performed the task during paired-pulse TMS with seven stimulus onset asynchronies between 0 and 180 ms. The task required identification of a stimulus defined by coherent motion which rapidly traversed one of four visual quadrants. TMS of V5 did not lead to statistically significant effects, though individual data indicates early activation in most participants. TMS of mIPS led to a relative decrease in performance on the Motion-Driven Attention task at 150 ms, and a trend towards an early decrease at 30 and 60 ms. TMS of pIPS showed a significant decrease in performance at 0 ms which could be interpreted as an interruption of vigilance. The timing found for mIPS is consistent with previous reports of early and later V5 timing possibly suggesting feedforward/feedback coupling of these areas during processing of motion driven attention.
Keywords:
TMS,
fMRI,
V5,
IPS,
Motion Perception,
Attention
Conference:
ACNS-2012 Australasian Cognitive Neuroscience Conference, Brisbane, Australia, 29 Nov - 2 Dec, 2012.
Presentation Type:
Poster Presentation
Topic:
Sensation and Perception
Citation:
Laycock
R,
Alexander
B,
Crewther
DP and
Crewther
SG
(2012). A Neuronavigated TMS Investigation of the Functional Chronometry of V5 and Middle and Posterior Intraparietal Sulcus in Motion-Driven Attention.
Conference Abstract:
ACNS-2012 Australasian Cognitive Neuroscience Conference.
doi: 10.3389/conf.fnhum.2012.208.00063
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:
05 Nov 2012;
Published Online:
07 Nov 2012.
*
Correspondence:
Dr. Robin Laycock, La Trobe University, School of Psychological Science, Melbourne, Australia, robin.laycock@rmit.edu.au