Visual form perception is a function of the visual cortex
نویسندگان
چکیده
منابع مشابه
Effects of visual deprivation on synaptic plasticity of visual cortex
TBS (Theta Burst Stimulation) and PBs (Primed Bursts) are among effective tetanic stimulations for induction of LTP in hippocampus. Recent studies have indicated that TBS is effective in LTP induction in layer III synapses of neocortex, only if applied to layer IV. However, the possibility of neocortical LTP induction using PBs, has not yet been investigated. Sensory deprivation greatly influ...
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A detailed neural model is being developed of how the laminar circuits of visual cortical areas Vl and V2 implement context-sensitive binding processes such as perceptual grouping and attention, and develop and learn in a stable way. The model clarifies how preattentive and attentive perceptual mechanisms are linked within these laminar circuits, notably how bottom-up, top-down, and horizontal ...
متن کاملAn fMRI study of human visual cortex in response to spatiotemporal properties of visual stimuli
ABSTRACT Background: The brain response to temporal frequencies (TF) has been already reported, but with no study reported for different TF with respect to various spatial frequencies (SF). Materials and Methods: fMRI was performed by 1.5T GE-system in 14 volunteers during checkerboard, with TFs of 4, 6, 8 and 10Hz in low and high SFs of 0.5 and 8cpd. Results: Average percentage BOLD signa...
متن کاملVisual form perception 6041 words
Peter U. Tse and Howard C. Hughes In the absence of any apparent effort, the human visual system recovers the 3 dimensional form of the visible environment from inherently ambiguous 2 dimensional retinal images. How this feat is accomplished is perhaps the most fundamental problem faced by vision science. Despite the impression that vision seems effortless, a vast amount of processing is involv...
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Effects of visual deprivation on the induction of epileptiform activity were studied in layer II/III of mature rat primary visual cortex. Field potentials were evoked by stimulation of layer IV in slices from control and dark-reared (OR) rats. Picrotoxin (PTX)-induced epileptic activity was characterized by spontaneous and evoked epileptic field potentials (EFPs). The results showed that OR s...
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ژورنال
عنوان ژورنال: Physiological Psychology
سال: 1978
ISSN: 0090-5046
DOI: 10.3758/bf03326751