Τίτλος:
Predictive smooth eye pursuit in a population of young men: I. Effects of age, IQ, oculomotor and cognitive tasks
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Smooth eye pursuit is believed to involve the integration of an extraretinal signal formed by an internal representation of the moving target and a retinal signal using the visual feedback to evaluate performance. A variation of the smooth eye pursuit paradigm (in which the moving target is occluded for a short period of time and subjects are asked to continue tracking) designed to isolate the predictive processes that drive the extraretinal signal was performed by 1,187 young men. The latency to the onset of change in pursuit speed, the time of decelerating eye-movement speed and the steady state residual gain were measured for each subject and correlated with measures of other oculomotor (closed-loop smooth eye pursuit, saccade, antisaccade, active fixation) and cognitive tasks (measuring sustained attention and working memory). Deceleration time increased with increasing age, while education, general IQ and cognitive variables had no effect on predictive pursuit performance. Predictive pursuit indices were correlated to those of closed-loop pursuit and antisaccade performance, but these correlations were very weak except for a positive correlation of residual gain to saccade frequency in the fixation task with distracters. This correlation suggested that the maintenance of active fixation is negatively correlated with the ability to maintain predictive pursuit speed. In conclusion, this study presents predictive pursuit performance in a large sample of apparently healthy individuals. Surprisingly, predictive pursuit was weakly if at all related to closed-loop pursuit or other oculomotor and cognitive tasks, supporting the usefulness of this phenotype in the study of frontal lobe integrity in normal and patient populations. © 2011 Springer-Verlag.
Συγγραφείς:
Kattoulas, E.
Smyrnis, N.
Stefanis, N.C.
Avramopoulos, D.
Stefanis, C.N.
Evdokimidis, I.
Περιοδικό:
Experimental Brain Research
Λέξεις-κλειδιά:
academic achievement; adult; article; attention; cognition; correlation analysis; eye fixation; eye movement; frontal lobe; groups by age; human; human experiment; information processing; intelligence quotient; latent period; male; normal human; priority journal; saccadic eye movement; smooth pursuit eye movement; task performance; velocity; visual stimulation; working memory, Adolescent; Adult; Age Factors; Attention; Fixation, Ocular; Frontal Lobe; Humans; Male; Memory, Short-Term; Motion Perception; Photic Stimulation; Predictive Value of Tests; Psychometrics; Pursuit, Smooth; Young Adult
DOI:
10.1007/s00221-011-2887-5
