Contrast Sensitivity in Human Visual Areas and Its Academic Article uri icon

abstract

  • Avidan, Galia, Michal Harel, Talma Hendler, Dafna Ben-Bashat, Ehud Zohary, and Rafael Malach. Contrast sensitivity in human visual areas and its relationship to object recognition. J Neurophysiol 87: 3102–3116, 2002; 10.1152/jn. 00669.2001. An important characteristic of visual perception is the fact that object recognition is largely immune to changes in viewing conditions. This invariance is obtained within a sequence of ventral stream visual areas beginning in area V1 and ending in high order occipito-temporal object areas (the lateral occipital complex, LOC). Here we studied whether this transformation could be observed in the contrast response of these areas. Subjects were presented with line drawings of common objects and faces in five different contrast levels (0, 4, 6, 10, and 100%). Our results show that indeed there was a gradual trend of increasing contrast …

publication date

  • January 1, 2002