Using the eye-movement system to control the head. |
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Authors: | I D Gilchrist V Brown J M Findlay M P Clarke |
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Institution: | Department of Experimental Psychology, University of Bristol, UK. i.d.gilchrist@bristol.ac.uk |
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Abstract: | We tested the hypothesis that A.I., a subject who has total ophthalmoplegia, resulting in a lack of eye movements, used her head to orientate in a qualitatively similar way to eye-based orientating of control subjects. We used four classic eye-movement paradigms and measured A.I.''s head movements while she performed the tasks. These paradigms were (i) the gap paradigm, (ii) the remote-distractor effect, (iii) the anti-saccade paradigm, and (iv) tests of saccadic suppression. In all cases, A.I.''s head saccades were qualitatively similar to previously reported eye-movement data. We conclude that A.I.''s head movements are probably controlled by the same neural mechanisms that control eye movements in unimpaired subjects. |
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