Development of spatiotemporal mechanisms in infant vision.
In adult spatiotemporal vision information is processed in parallel by a number of mechanisms tuned for orientation and spatial frequency. An examination of infant neuroanatomical data suggests that three major factors are involved in the development of these mechanisms: (1) Growth of foveal cone outer segments causes an increase in mechanism sensitivity. (2) Migration of foveal cones produces a change in spatial scale and a progressive shift of mechanism tuning towards higher spatial frequencies. (3) Development of cortical inhibition transforms low-pass into bandpass spatial frequency and orientation tuning. These changes are developed into a quantitative model which is shown to provide a coherent interpretation of many of the psychophysical data on infant vision.
Wilson
H R
HR
Department of Ophthalmology and Visual Science, University of Chicago, IL 60637.
D000328:Adult; D000375:Aging / Q000502:physiology; D002657:Child Development; D005074:Evoked Potentials, Visual; D005584:Fovea Centralis; D006801:Humans; D007223:Infant; D008959:Models, Neurological; D010786:Photoreceptor Cells / Q000502:physiology; D012160:Retina / Q000254:growth & development; D012399:Rotation; D013028:Space Perception / Q000502:physiology*; D013997:Time Factors; D014792:Visual Acuity; D014793:Visual Cortex / Q000254:growth & development