Cortical column design: a link between the maps of preferred orientation and orientation tuning strength?
نویسندگان
چکیده
منابع مشابه
Link between orientation and retinotopic maps in primary visual cortex.
Maps representing the preference of neurons for the location and orientation of a stimulus on the visual field are a hallmark of primary visual cortex. It is not yet known how these maps develop and what function they play in visual processing. One hypothesis postulates that orientation maps are initially seeded by the spatial interference of ON- and OFF-center retinal receptive field mosaics. ...
متن کاملTopological Singularities in Cortical Orientation Maps: the Sign Theorem Correctly Predicts Orientation Column Patterns in Primate Striate Cortex
Optical imaging methods have revealed the spatial arrangement of orientation columns across striate cortex, usually summarized in terms of two measurements at each cortical location: (i) a \best" stimulus orientation, corresponding to the stimulus orientation that elicits a maximal response , and (ii), the magnitude of the response to the best orientation. This mapping has been described as con...
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چکیده ندارد.
Boundary cue invariance in cortical orientation maps.
We effortlessly perceive oriented boundaries defined by either luminance changes ('first-order' cues) or texture variations ('second-order' cues). Many neurons in mammalian visual cortex show orientation preference to both types of boundaries, but it is uncertain how they contribute to perceptual orientation cue-invariance at the neuronal population level. Using optical imaging in cat A 18, we ...
متن کاملPreferred Orientation in Microstructures
The microstructures of eutectics between compounds were studied for systems MnO-MnS, NaCl-NaF, NaBr-NaF, LiF-NaF, and FeO-FeS. With the exception of FeS, all the compounds had the NaC1-type structure. In the systems having only NaC1-type structures, the lamellas of the two eutectic phases had matching crystal orientations. There was less consistency among the eutectic systems, however, than bet...
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ژورنال
عنوان ژورنال: Biological Cybernetics
سال: 1993
ISSN: 0340-1200,1432-0770
DOI: 10.1007/bf00202561