scholarly journals Saccadic eye movement following a moving object results in a longer perceived duration compared with smooth pursuit

2018 ◽  
Vol 18 (10) ◽  
pp. 331
Author(s):  
Riko Iizuka ◽  
Yuko Yotsumoto
Keyword(s):  
Eye Movement ◽  
Smooth Pursuit ◽  
Moving Object ◽  
Saccadic Eye Movement ◽  
Perceived Duration

scholarly journals Changes in visual sensitivity during smooth pursuit and saccadic eye movement

2015 ◽  
Vol 15 (12) ◽  
pp. 1022 ◽  
Author(s):  
Doris Braun ◽  
Alexander Schütz ◽  
Karl Gegenfurtner
Keyword(s):  
Eye Movement ◽  
Smooth Pursuit ◽  
Visual Sensitivity ◽  
Saccadic Eye Movement

scholarly journals Role of Primate Cerebellar Hemisphere in Voluntary Eye Movement Control Revealed by Lesion Effects

2009 ◽  
Vol 101 (2) ◽  
pp. 934-947 ◽  
Author(s):  
Masafumi Ohki ◽  
Hiromasa Kitazawa ◽  
Takahito Hiramatsu ◽  
Kimitake Kaga ◽  
Taiko Kitamura ◽  
...  
Keyword(s):  
Eye Movements ◽  
Eye Movement ◽  
Smooth Pursuit ◽  
Movement Control ◽  
Cerebellar Hemisphere ◽  
Target Velocity ◽  
Eye Movement Control ◽  
Pursuit Eye Movements ◽  
Catch Up

The anatomical connection between the frontal eye field and the cerebellar hemispheric lobule VII (H-VII) suggests a potential role of the hemisphere in voluntary eye movement control. To reveal the involvement of the hemisphere in smooth pursuit and saccade control, we made a unilateral lesion around H-VII and examined its effects in three Macaca fuscata that were trained to pursue visually a small target. To the step (3°)-ramp (5–20°/s) target motion, the monkeys usually showed an initial pursuit eye movement at a latency of 80–140 ms and a small catch-up saccade at 140–220 ms that was followed by a postsaccadic pursuit eye movement that roughly matched the ramp target velocity. After unilateral cerebellar hemispheric lesioning, the initial pursuit eye movements were impaired, and the velocities of the postsaccadic pursuit eye movements decreased. The onsets of 5° visually guided saccades to the stationary target were delayed, and their amplitudes showed a tendency of increased trial-to-trial variability but never became hypo- or hypermetric. Similar tendencies were observed in the onsets and amplitudes of catch-up saccades. The adaptation of open-loop smooth pursuit velocity, tested by a step increase in target velocity for a brief period, was impaired. These lesion effects were recognized in all directions, particularly in the ipsiversive direction. A recovery was observed at 4 wk postlesion for some of these lesion effects. These results suggest that the cerebellar hemispheric region around lobule VII is involved in the control of smooth pursuit and saccadic eye movements.

Express Saccades and Smooth Pursuit Eye Movement Function in Schizophrenic, Affective Disorder, and Normal Subjects

1993 ◽  
Vol 5 (3) ◽  
pp. 303-316 ◽  
Author(s):  
Anne B. Sereno ◽  
Philip S. Holzman
Keyword(s):  
Response Time ◽  
Eye Movement ◽  
Smooth Pursuit ◽  
Normal Subjects ◽  
Control Group ◽  
Saccadic Response ◽  
Group A ◽  
Schizophrenic Group ◽  
Movement Function ◽  
Normal Controls

Saccadic and smooth pursuit eye movements were recorded in three groups of subjects: a schizophrenic group, a non-schizophrenic psychotic patient comparison group, and a normal control group. Schizophrenic subjects demonstrated a greater decrease in saccadic response time than did normal controls in a gap task (when the fixation point was turned off 150 msec before the target appeared). The psychiatric comparison subjects did not differ from normal controls. Further, only schizophrenic subjects demonstrated a relation between smooth pursuit and saccadic eye movement performance, such that subjects with impaired smooth pursuit showed a larger decrease in saccadic response time in the gap task. The relation between performance on the gap task and quality of smooth pursuit and its relevance for a prefrontal deficit hypothesis of schizophrenia are discussed.

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