Accuracy Difference Between Visually Triggered And Internally Guided Saccade - Comparison In Skeletal And Retinal Coordinate Systems

DOI

説明

The differences in the accuracy between visually triggered saccade (VTS) and internally guided saccade (IGS) were investigated by the three target-presentation methods which we designed. Fixed target saccadic test (FTST) elicited the IGS. Both opposite target saccadic test(rnST) and Random target saccadic test (RTST) elicited WS. First, accuracies of VTS and IGS were compared. Here, the accuracy were defined by the error from target and eye positions after saccade. The results suggests that the accuracy of IGS is constant independent with saccadic amplitude while that of VTS becomes worse as saccadic amplitude metrically and those occurred asyretrically with respect to the median line of subject's head were distinguished, and their accuracies were mqared. The accuracy of WS did not change between symetrical and asymetrical condition, but the accuracy of IGS changed. These results suggest that VTS uses only the visual target information on the retina and that IGS uses at least something concerning the skeletal coordinate system, probably the remembered target information.

収録刊行物

詳細情報 詳細情報について

問題の指摘

ページトップへ