Texture density and normal development of visual depth avoidance
โ Scribed by Bernard Z. Karmel; Patricia N. Miller; Lawrence Dettweiler; Gary Anderson
- Publisher
- John Wiley and Sons
- Year
- 1970
- Tongue
- English
- Weight
- 942 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0012-1630
No coin nor oath required. For personal study only.
โฆ Synopsis
Kittens, dutch-belted rabbits, and albino rabbits were tested daily after eye openihg for development of a reliable avoidance response on the visual cliff under varying conditions of texture density of elements comprising the checkerboard patterns of deep and shallow surfaces. Depth avoidance was demonstrated at an earlier age when coarse (34O to 18O retinal angle) rather than fine (2' or less of retinal angle) elements comprising shallow and deep surfaces were available to the subject. Visually guided placing to surfaces (in cats) developed after onset of visual cliff depth avoidance when coarse texture elements, but not when fine texture elements were used. Differences in onset of depth-avoidance responding under different conditions of texture density across species as well as non-coincidence of onset of visual placing with depth avoidance in cats indicated that changes in texture-processing abilities with age and as a function of species characteristics interact with developing visual-motor responding. The results were interpreted relative to organismic development of texture-processing systems affecting degree of degradation of primary visual input during development. The importance of texture-derived afferent information on development of visualmotor behaviors was discussed. visual development depth perception depth avoidance cats rabbits visual-motor development
๐ SIMILAR VOLUMES
Functional development of thalamic input to the cortex in anaesthetised wallaby pouch young between postnatal day 25 (P25) and P153 has been studied by electrical stimulation of the optic nerve, current source density (CSD) analysis, and histologic identification of recording sites. Conduction in th