| Global saccadic adaptation. | |
| | |
MedLine Citation:
|
PMID: 20600235 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
|
Our actions need constant calibration to arrive accurately at locations of their intended goals; errors in execution must drive rapid adjustments. As an example, saccadic eye movements are vital for bringing objects of interest into the high-acuity center of vision and they must be continually tuned to compensate for ongoing changes in body, muscle strength and neural variability. This adaptation of eye movement responses can be induced artificially by systematically displacing the saccade targets by a constant proportion during each saccade. Observers do not notice these shifts and yet the oculomotor system does, rapidly compensating for the landing error until the saccades finally land close to the artificially displaced target. This recalibration has been described as spatially selective, dropping off with distance in direction and amplitude from the adapted saccade vector. However, we now report that this local adaptation property is a consequence of adapting to only one direction at a time, the method generally used in previous studies. When we induced adaptation in all directions, using a quasi-random walk where each target was displaced 25% back toward to the previous fixation, we found strong, spatially generalized adaptation that could not be accounted for by an accumulation of many vector-specific adaptations. This global adaptation is a plausible strategy for calibration given the absence of any obvious growth changes or muscle deficits that would lead to vector specific losses and it provides a robust model for testing motor calibration. |
| | |
Authors:
|
Martin Rolfs; Tomas Knapen; Patrick Cavanagh |
Related Documents
:
|
11684175 - Hemispheric interactions in simple reaction time. 17271355 - A distributed model of the saccadic system: simulations of trajectory variations produc... 16260025 - Antisaccade velocity, but not latency, results from a lack of saccade visual guidance. 17114395 - A comparison of visual and haltere-mediated feedback in the control of body saccades in... 8816715 - Phosphate analogs block adaptation in hair cells by inhibiting adaptation-motor force p... 19761325 - Pupil dynamics during bistable motion perception. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-06-25 |
Journal Detail:
|
Title: Vision research Volume: 50 ISSN: 1878-5646 ISO Abbreviation: Vision Res. Publication Date: 2010 Aug |
Date Detail:
|
Created Date: 2010-08-16 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0417402 Medline TA: Vision Res Country: England |
Other Details:
|
Languages: eng Pagination: 1882-90 Citation Subset: IM |
Copyright Information:
|
Copyright 2010 Elsevier Ltd. All rights reserved. |
Affiliation:
|
New York University, Department of Psychology, 6 Washington Place, 10003 New York, NY, USA. martin.rolfs@gmail.com |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Transfer of perceptual learning of depth discrimination between local and global stereograms.
Next Document: VISION RESEARCH 1961-2011: Retrospects and Prospects on the 50th Anniversary of VISION RESEARCH.