RESUMEN
A possible role of transient and sustained mechanisms of vision in early light and dark adaptation was studied using the adaptive fields with different rates of luminance changes. The curve forms of early light and dark adaptation and time integration at different rates of switching on and off the adaptive field were studied as well as the changes of contrast sensitivity related to rates of background luminance changes. The data obtained confirm participation of transient and sustained mechanisms of vision in early light and dark adaptation. The contribution of each mechanism depends on the rate and direction of the luminance changes.
Asunto(s)
Adaptación a la Oscuridad , Visión Ocular/fisiología , Fenómenos Biofísicos , Biofisica , Humanos , Enmascaramiento Perceptual/fisiología , Umbral Sensorial , Factores de TiempoRESUMEN
Brightness thresholds of the test stimulus were measured at different distances from a moving contrast contour, the contour's velocity being 0, 5, 20, and 30 grad/sec. The data show a significant extension of the spatial and temporal zones of the contour influence which depends on the contour's velocity. Some neurophysiological correlates of this phenomenon are discussed.
