Linked Life Data

16162836

Source:http://linkedlifedata.com/resource/pubmed/id/16162836

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2005-12-12
pubmed:abstractText
In what frame of reference does the supplementary eye field (SEF) encode saccadic eye movements? In this study, the "saccade collision" test was used to determine whether a saccade electrically evoked in the monkey's SEF is programmed to reach an oculocentric goal or a nonoculocentric (e.g., head or body-centered) goal. If the eyes start moving just before or when an oculocentric goal is imposed by electrical stimulation, the trajectory of the saccade to that goal should compensate for the ongoing movement. Conversely, if the goal imposed by electrical stimulation is nonoculocentric, the trajectory of the evoked saccade should not be altered. In head-fixed experiments, we mapped the trajectories of evoked saccades while the monkey fixated at each of 25 positions 10 degrees apart in a 40 x 40 degrees grid. For each studied SEF site, we calculated convergences indices and found that "convergent" and "nonconvergent" sites were separately clustered: nonconvergent rostral to convergent. Then, the "saccade collision" test was systematically applied. We found compensation at sites where saccades were of the nonconvergent type and practically no compensation at sites where saccades were of the convergent type. The results indicate that the SEF can encode saccade goals in at least two frames of reference and suggest a rostrocaudal segregation in the representation of these two modes.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0022-3077
pubmed:author
pubmed:issnType
Print
pubmed:volume
95
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
159-70
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Frames of reference for saccadic command tested by saccade collision in the supplementary eye field.
pubmed:affiliation
Department of Neurobiology, UCLA School of Medicine, Los Angeles, CA 90095-1763, USA.
pubmed:publicationType
Journal Article, Research Support, N.I.H., Extramural