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Turtle dorsal cortex (dCx), a three-layered cortical area of the reptilian telencephalon, receives inputs from the retina via the thalamic lateral geniculate nucleus and constitutes the first cortical stage of visual processing. The receptive fields of dCx neurons usually occupy the entire contralateral visual field. Electrophysiological recordings in awake and anesthetized animals reveal that dCx...
The three-layered visual cortex of turtle is characterized by extensive intracortical axonal projections and receives non-retinotopic axonal projections from lateral geniculate nucleus. What spatiotemporal transformation of visual stimuli into cortical activity arises from such tangle of malleable cortical inputs and intracortical connections? To address this question, we obtained band-pass filtered...
The interest in neuronal networks originates for a good part in the option not to construct, but to train them. The mechanisms governing synaptic modifications during such training are assumed to depend on signals locally available at the synapses. In contrast, the performance of a network is suitably measured on a global scale. Here we propose a learning rule that addresses this conflict. It is inspired...
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