Development of gaze tracking of small and large objects.

Development of gaze tracking of small and large objects. Research Abstract Details 

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Development of gaze tracking of small and large objects. Abstract Text:

Kerstin Rosander,Claes von Hofsten,

A longitudinal study was designed to address the relationships between the smooth pursuit (SP) and the optokinetic response (OKR). Eye and head movements were measured in infants between 7 and 14 weeks of age. They were placed in front of a moving object subtending visual angles of 2.5, 5, 7, 14, 21, 28, and 35 degrees. The object oscillated sinusoidally along a horizontal path with a frequency of 0.25 Hz and an amplitude of +/-25 degrees visual angle. It was found that the number of saccades was dependent on object size: at 6 and 9 weeks of age there were more saccades for the smallest objects. With increasing age, the number of saccades decreased. The composite eye movement gain (smooth tracking + saccades) did not change with age but for the 6.5-week group the gain was higher for smaller objects. The gain of the smooth eye tracking increased with age and showed no dependency on object size. In conclusion, the results do not support the concept of two separate systems, the OKR and the SP, each of them processing eye tracking of small and large objects. Finally, it was observed that two infants at 6.5 weeks of age who used considerable head movements did not inhibit the vestibular-ocular response.

Development of gaze tracking of small and large objects. Publishing Authors By Initials

K Rosander,C von Hofsten,

For similar nervous system: neural pathways: afferent pathways: visual pathways research abstracts see: nervous system: neural pathways: afferent pathways: visual pathways research

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Development of gaze tracking of small and large objects. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Experimental brain research. Experimentelle Hirnfo

VOLUME: 146

Page Numbers: 257-64

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ISSN: 0014-4819

DAY: 26

MONTH: 06

YEAR: 2002

Development of gaze tracking of small and large objects. Information

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LANGUAGE: eng

NlmUniqueID: 43312

Development of gaze tracking of small and large objects. Keywords Mesh Terms:

KEYWORDS: Visual Pathways

MESH TERMS: physiology

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Grant and Affiliation Information for Development of gaze tracking of small and large objects.

AFFILIATION: Department of Psychology, P.O. Box 1225, Uppsala University, 751 42 Uppsala, Sweden. kerstin.rosander@psyk.uu.se

Country: Germany

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MEDLINETA: Exp Brain Res

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