Localization of brief light stimuli on differently labelled reference patterns during smooth eye tracking
Mitrani, L.; Mateeff, S.
Acta Physiologica et Pharmacologica Bulgarica 7(2): 19-24
1981
ISSN/ISBN: 0323-9950 PMID: 7315387 Document Number: 170347
Experiments in humans are reported in which the mislocation of brief visual stimuli during tracking eye movements was measured in respect to 3 kinds of reference patterns placed in the horizontal plane: A) a scale with numbered divisions; B) a bar consisting of 7 differently hatched regions; and C) 2 single markings, the distance between them being equal to the length of patterns A and B. A mislocation of a magnitude up to 2.degree. was obtained in all experiments. The mislocation on reference patterns A and C was the same, the presence of numbered markings did not influence it. The mislocation magnitude tended to decrease when reference pattern B was applied. Clearly labeled structures near the place of stimulus presentation were a visual cue which affects localization; a scale with identical numbered markings, despite their proximity to the test stimulus, was not a structure of this type.