Some Observations of the Human Saccadic Visual Tracking System to the Successive Stimuli.

Choi, Ouk; Kim, Hong Bok; Nam, Moon Hyon; Park, Sang Hui

Original Article

Journal of the Korean Ophthalmological Society 1976;17(3):267-274.
Published online March 1, 1976.

Some Observations of the Human Saccadic Visual Tracking System to the Successive Stimuli.

Ouk Choi, Hong Bok Kim, Moon Hyon Nam, Sang Hui Park

Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea.

연속적인 자극에 대한 Saccade 안구운동계의 특성

최억 , 김홍복 , 남문현 , 박상희 ( Ouk Choi , Hong Bok Kim , Moon Hyun Nam , Sang Hui Park )

Abstract

This study aims to ascertain the human saccadic visual tracking characteristics by measuring the eye movement to the double-step stimuli. Responses to simple step and double-step target motions were measured where the target mode and stimulus durations were randomized. To measure the eye movement the Photo-electric Eye Monitor was constructed based on limbus tracking. The results indicate that observers represented two kind of responses (A-or B-type) depending upon the stimulus duration. The percentage of occurrances increased as the stimulus duration increased from 50 to 200 msec. When the subject responded to both target motions, the reaction time of the second saccade was shorter than that of the first. The successive visual information is to change continuously the reaction time or cancel the initial saccade. Our results revealed that parallel data processing characteristics of the visual tracking systems and the saccadic decision-makings are influenced by the temporal relationships.