Title: Area Summation in Human Visual System: Psychophysics, Fmri and Modeling. 1 Abbreviated Title: Area Summation in Human Vision 2
نویسندگان
چکیده
Title: Area summation in human visual system: psychophysics, fMRI and modeling. 1 Abbreviated title: Area summation in human vision 2 Authors and author addresses: 3 4 Lauri Nurminen, Brain Research Unit, Low Temperature Laboratory, and Advanced 5 Magnetic Imaging Centre, Helsinki University of Technology, Espoo, Finland; 6 Department of Psychology, University of Helsinki, Helsinki, Finland 7 8 Markku Kilpeläinen, Department of Psychology, University of Helsinki, Helsinki, 9 Finland 10 11 Pentti Laurinen, Department of Psychology, University of Helsinki, Helsinki, Finland 12 13 Simo Vanni, Brain Research Unit, Low Temperature Laboratory, and Advanced 14 Magnetic Imaging Centre, Helsinki University of Technology, Espoo, Finland 15 16 Corresponding author: Markku Kilpeläinen, Department of Psychology, University of 17 Helsinki, PO BOX 9, FIN-00014, Helsinki, Finland 18 19 20 21 22 23 Articles in PresS. J Neurophysiol (August 26, 2009). doi:10.1152/jn.00201.2009
منابع مشابه
Area summation in human visual system: psychophysics, fMRI, and modeling.
Contextual modulation is a fundamental feature of sensory processing, both on perceptual and on single-neuron level. When the diameter of a visual stimulus is increased, the firing rate of a cell typically first increases (summation field) and then decreases (surround field). Such an area summation function draws a comprehensive profile of the receptive field structure of a neuron, including ar...
متن کاملAcetylcholine dynamically controls spatial integration in marmoset primary visual cortex Abbreviated title: Acetylcholine and spatial summation
Abbreviated title: Acetylcholine and spatial summation M.J. Roberts, W. Zinke, K. Guo, R. Robertson, J.S. McDonald, A. Thiele Psychology, Brain and Behaviour, University of Newcastle upon Tyne, UK current address: Max Planck Institute für Kybernetik, Tübingen, Germany Corresponding author: A. Thiele, Henry Wellcome Building, University of Newcastle upon Tyne, Newcastle upon Tyne, NE2 4HH, tel: ...
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 کاملElongated physiological summation pools in the human visual cortex1Preliminary results were reported at the 1996 Annual Meeting of the Society for Neuroscience: [50].1
The visibility of gratings improves with increasing stimulus area. This effect is usually interpreted as being due to probability summation between the outputs of linear, independent spatial filters, although non-linear spatial summation can have similar effects [1]. In order to distinguish between probabilistic and physiological summation models, we measured contrast thresholds using the Visua...
متن کاملSpatial summation of blue-on-yellow light increments and decrements in human vision
In the primate retina, blue-OFF cells are less numerous than blue-ON cells but no psychophysical equivalent of this asymmetry has been found so far. The hypothesis put forward in the present study is that the ON-OFF asymmetry should manifest itself in the size and effectiveness of spatial summation of S-cone signals of opposite polarity. To test this hypothesis upon selective stimulation of the...
متن کامل