Linked Life Data

6661614

Source:http://linkedlifedata.com/resource/pubmed/id/6661614

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
1984-3-14
pubmed:abstractText
The cerebellar vermal cortex in monkey was electrically stimulated through a microelectrode with brief pulse strains synchronized to the onset of selected saccadic eye movements. The delivery of these intrasaccadic microstimuli were randomly interposed in groups of saccadic eye movements made by trained monkeys to known target locations. The trajectory of the saccades with intrasaccadic stimuli were then compared to those made to the same target without stimulation. Contralaterally directed saccades were consistently slowed from their normal trajectory (normally at 12 ms after stimulus onset) and were made hypometric. Ipsilaterally directed saccades were not affected. Vertical eye movement components were also affected at some stimulating sites. Changing the stimulus train duration from 10 to 80 ms had no effect on the change in velocity or amount of dysmetria produced in contralateral saccades. Taken together these results suggest that a different set of cerebellar elements were being stimulated by the intrasaccadic mode as contrasted to stimulation at the same site at random times. Furthermore, the short period of time during an ongoing saccade presents a unique instant in which to test the relationship of various central structures to the saccadic system. Based on current concepts of the organization of the brainstem saccadic pulse generators, these data are interpreted to suggest that: (1) the cerebellar vermis has a rather direct influence on the contralateral saccade generator, (2) this influence can act to recode (diminish) the generator's representation of the size of motor error, (3) the effect occurs at a point in the generator where motor error is spatially coded.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0006-8993
pubmed:author
pubmed:issnType
Print
pubmed:day
12
pubmed:volume
288
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
131-43
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1983
pubmed:articleTitle
Microstimulation of the primate cerebellar vermis during saccadic eye movements.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't