Properties of saccades generated as a choice response

Cited 0 time in webofscience Cited 23 time in scopus
Lee, Kyoung-Min; Keller, Edward L; Heinen, Stephen J
Issue Date
Springer Verlag
Exp Brain Res. 2005 Apr;162(3):278-86. Epub 2004 Dec 10.
AdultBrain/physiologyChoice Behavior/*physiologyCognition/*physiologyDecision Making/*physiologyHumansMiddle AgedNeuropsychological TestsPhotic StimulationReaction Time/*physiologySaccades/*physiology
Since Hick's original description, many subsequent studies have confirmed the logarithmic relationship that exists between response time and the number of alternatives (NA) for a choice response. In the present study a novel paradigm was used to quantify saccade response time as a function of NA. Normal subjects were required to make a saccade to the remembered location of a visual target whose color was specified by a centrally located cue. The paradigm thus required a stimulus-response transformation similar to that used by Hick. The results show that, when such a transformation was required, a logarithmic relationship was found for saccadic response time. The use of a color-to-location paradigm to study saccade choice response time produced an unexpected additional result that may provide insight into the neural organization of the saccadic system. When the number of alternative choice responses was large (4 or 8), subjects frequently made a two-saccade response instead of a single saccade to the correct location. The first movement in such a sequence was in the correct direction, but was hypometric. A second movement then followed which moved the eyes onto the correct location. These results suggest dynamic dissociations in the mechanisms underlying the triggering of saccades and the specification of their metrics.
0014-4819 (Print)
Files in This Item:
There are no files associated with this item.
Appears in Collections:
College of Medicine/School of Medicine (의과대학/대학원)Dept. of Neurology (신경과학교실)Journal Papers (저널논문_신경과학교실)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.