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  • 1
    Digitale Medien
    Digitale Medien
    Magnification factor and receptive field size in foveal striate cortex of the monkey (1981)
    Springer
    Experimental brain research 44 (1981), S. 213-228 
    Details
    ISSN: 1432-1106
    Schlagwort(e): Striate cortex ; Monkey ; Magnification ; Fovea ; Receptive field ; Visual acuity
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Receptive field size and magnification have been studied in striate cortex of awake, behaving rhesus monkeys at visual eccentricities in the range of 5–160 min. The major findings that emerge are (1) magnification in the foveola achieves values in the range of 30 mm/deg, (2) mean field size is not proportional to inverse magnification in contrast with previous reports, and (3) the product, magnification X aggregate field size, is greater in central vision than in peripheral vision. Thus, a point of light projected onto foveal retina is “seen” by larger numbers of striate cortical cells than a point of light projected onto peripheral retina. Implications of these findings for visual localization and two-point discrimination are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00237343
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Laminar distribution of preferred orientations in foveal striate cortex of the monkey (1980)
    Springer
    Experimental brain research 41 (1980), S. 54-60 
    Details
    ISSN: 1432-1106
    Schlagwort(e): Visual cortex ; Orientation column ; Monkey ; Inhibition ; Microelectrode recording
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Microelectrode penetrations normal to the layers of foveal striate cortex in awake, behaving monkeys have revealed two new facts about the distribution of orientation preferences in this tissue: (1) In the top layers there is a predominance of vertical orientation preferences at eccentricities of less than 30 min, and a predominance of oblique orientation preferences at eccentricities of 30 min to 2 deg. (2) At all eccentricities between 0 and 2 deg there is a striking difference in orientation preference between upper layer (supragranular) and lower layer (infragranular) cells.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00236679
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Orientation shift between upper and lower layers in monkey visual cortex (1983)
    Springer
    Experimental brain research 50 (1983), S. 133-145 
    Details
    ISSN: 1432-1106
    Schlagwort(e): Visual cortex ; Monkey ; Orientation ; Inhibition ; Column
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Microelectrode penetrations nearly normal to the layers of foveal striate cortex in awake, behaving monkeys reveal a shift in orientation preference between cells in the upper and lower layers. Mean shift size for 57 penetrations is 54.8 °, with 70% of the penetrations showing shifts of 45–90 °. Marking lesions localize the shift to the border between layers 4C and 5. The data are suggestive of inhibition between the upper and lower layers within an “orientation column”.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00238240
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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