Learning and Adaptation in a Recurrent Model of V1 Orientation Selectivity
نویسندگان
چکیده
منابع مشابه
Learning and adaptation in a recurrent model of V1 orientation selectivity.
Learning and adaptation in the domain of orientation processing are among the most studied topics in the literature. However, little effort has been devoted to explaining the diverse array of experimental findings via a physiologically based model. We have started to address this issue in the framework of the recurrent model of V1 orientation selectivity and found that reported changes in V1 or...
متن کاملPredictions of a recurrent model of orientation selectivity
Recurrent models of orientation selectivity in the visual cortex postulate that an initially broad tuning given by the pattern of geniculate afferents is substantially sharpened by intracortical feedback. We show that these models can be tested on the basis of their predicted responses to certain visual stimuli, without the need for pharmacological or physiological manipulations. First, we cons...
متن کاملCorrelation between spatial frequency and orientation selectivity in V1 cortex: Implications of a network model
We addressed how spatial frequency and orientation selectivity coexist and co-vary in Macaque primary visual cortex (V1) by simulating cortical layer 4Cα of V1 with a large-scale network model and then comparing the model's behavior with a population of cells we recorded in layer 4Cα. We compared the distributions of orientation and spatial frequency selectivity, as well as the correlation betw...
متن کاملA Comparison among some Models of V1 Orientation Selectivity
Several models exist for explaining V1 orientation tuning. The modified feedforward model (MFM) and the recurrent model (RM) are major examples. We have implemented, at the same level of detail, these two models alongside a few newer variations, and thoroughly compared their receptive-field structures. We found that anti-phase inhibition in the MFM enhances both spatial phase information and or...
متن کاملOrientation selectivity in macaque V1: diversity and laminar dependence.
We studied the steady-state orientation selectivity of single neurons in macaque primary visual cortex (V1). To analyze the data, two measures of orientation tuning selectivity, circular variance and orientation bandwidth, were computed from the tuning curves. Circular variance is a global measure of the shape of the tuning curve, whereas orientation bandwidth is a local measure of the sharpnes...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Neurophysiology
سال: 2003
ISSN: 0022-3077,1522-1598
DOI: 10.1152/jn.00970.2002