JN Fuel your research with LabChart
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
 QUICK SEARCH:   [advanced]


     


J Neurophysiol (April 19, 2006). doi:10.1152/jn.00315.2006
This Article
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
96/3/1420    most recent
00315.2006v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by McSorley, E.
Right arrow Articles by Walker, R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by McSorley, E.
Right arrow Articles by Walker, R.
Submitted on March 24, 2006
Accepted on April 10, 2006

Time-course of oculomotor inhibition revealed by saccade trajectory modulation

Eugene McSorley1, Patrick Haggard2, and Robin Walker3*

1 Psychology, University of Reading, Reading, Berkshire, United Kingdom
2 Psychology, University College London, London, United Kingdom
3 Psychology, Royal Holloway, University of London, London, Surrey, United Kingdom

* To whom correspondence should be addressed. E-mail: robin.walker{at}rhul.ac.uk.

Selecting a stimulus as the target for a goal-directed movement involves inhibiting other competing possible responses. Both target and distractor stimuli activate populations of neurons in topographic oculomotor maps such as the superior colliculus. Local inhibitory interconnections between these populations ensure only one saccade target is selected. Suppressing saccades to distractors may additionally involve inhibiting corresponding map regions to bias the local competition. Behavioural evidence of these inhibitory processes comes from the effects of distractors on oculomotor and manual trajectories. Individual saccades may initially deviate either towards or away from a distractor, but the source of this variability has not been investigated. Here we investigate the relation between distractor-related deviation of trajectory and saccade latency. Targets were presented with, or without, distractors, and the deviation of saccade trajectories due to the presence of distractor was measured. A fixation gap paradigm was used to manipulate latency independently of the influence of competing distractors. Shorter-latency saccades deviated towards distractors and longer-latency saccades deviated away from distractors. The transition between deviation towards or away from distractors occurred at a saccade latency of around 200 ms. This shows that the time course of the inhibitory process involved in distractor suppression are relatively slow.




This article has been cited by other articles:


Home page
J. Neurosci.Home page
M. R. Harwood and J. P. Herman
Optimally Straight and Optimally Curved Saccades
J. Neurosci., July 23, 2008; 28(30): 7455 - 7457.
[Full Text] [PDF]


Home page
J. Neurophysiol.Home page
R. M. McPeek
Incomplete Suppression of Distractor-Related Activity in the Frontal Eye Field Results in Curved Saccades
J Neurophysiol, November 1, 2006; 96(5): 2699 - 2711.
[Abstract] [Full Text] [PDF]




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
Visit Other APS Journals Online
Copyright © 2006 by the The American Physiological Society.