19 research outputs found
W-and Y-cells in the C layers of the cat's lateral geniculate nucleus: normal properties and effects of monocular deprivation
Effects of aging on the primate visual system: spatial and temporal processing by lateral geniculate neurons in young adult and old rhesus monkeys
The Evolution of Academic-Based Geriatric Emergency Preparedness and Response (GEPR) Training for Medicine, Health, and Behavioral Sciences
Commentary on the Geriatric Healthcare Workforce: Leveraging the Potential of Interprofessional Teams
Feasibility testing of smart tablet questionnaires compared to paper questionnaires in an amputee rehabilitation clinic
Morphological Changes in the Geniculocortical Pathway Associated with Monocular Deprivation
Sparse coding can predict primary visual cortex receptive field changes induced by abnormal visual input
Receptive fields acquired through unsupervised learning of sparse representations of natural scenes have similar properties to primary visual cortex (V1) simple cell receptive fields. However, what drives in vivo development of receptive fields remains controversial. The strongest evidence for the importance of sensory experience in visual development comes from receptive field changes in animals reared with abnormal visual input. However, most sparse coding accounts have considered only normal visual input and the development of monocular receptive fields. Here, we applied three sparse coding models to binocular receptive field development across six abnormal rearing conditions. In every condition, the changes in receptive field properties previously observed experimentally were matched to a similar and highly faithful degree by all the models, suggesting that early sensory development can indeed be understood in terms of an impetus towards sparsity. As previously predicted in the literature, we found that asymmetries in inter-ocular correlation across orientations lead to orientation-specific binocular receptive fields. Finally we used our models to design a novel stimulus that, if present during rearing, is predicted by the sparsity principle to lead robustly to radically abnormal receptive fields