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  • 1
    Electronic Resource
    Electronic Resource
    Is areal extent in sensory cerebral cortex determined by peripheral innervation density? (1986)
    Springer
    Experimental brain research 63 (1986), S. 650-654 
    Details
    ISSN: 1432-1106
    Keywords: Mouse somatosensory system ; Barrel ; Mystacial vibrissae ; Sensory innervation density ; Brain evolution ; Cortical magnification factor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The whisker-to-barrel pathway of mice (an important component of the animal's somatosensory system) was studied in two experiments. In one, the cortical representation of a row of whiskers was caused to be larger by lesioning a neighbouring row of follicles, while the innervation density remained unchanged. In the second experiment mice, selectively bred for particular whisker and barrel patterns, showed for their supernumerary vibrissal follicles a relatively large cortical representation. On the basis of the second experiment we formulate a possible role of the sensory periphery in brain evolution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00237487
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Tangential orientation and spatial order in dendrites of cat auditory cortex: A computer microscope study of Golgi-impregnated material (1979)
    Springer
    Experimental brain research 36 (1979), S. 411-431 
    Details
    ISSN: 1432-1106
    Keywords: Auditory cortex ; Computer microscopy ; Dendrites ; Golgi ; Orientation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In the tangential plane (parallel to the pial surface) dendrites in the primary auditory cortex (A1) of cat were found to exhibit preferentially oriented growth. This was shown by means of a computer microscope study of Golgi-Cox stained neurons as seen in 100 μm and 300 μm thick tangential sections. Two techniques were used to represent the 3-dimensional structure of dendrites: the “dendritic stick” and the “dendritic trumpet”. The former dismembers a dendrite into its individual segments; the latter considers a dendrite as an entity and represents it by its centroid, its moments and the spatial dispersion of its branches. Both statistical and Fourier analyses of the data show that within the tangential plane there is a significant and consistent orientation of the dendritic sticks in a dorso-ventral direction which seems correlated with the cortical isofrequency contours observed in electrophysiological maps of the A1 region. The dendritic trumpet analyses also show a distinctly non-random vertical distribution of pyramidal cell basal dendrites but not of stellate cell dendrites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00238513
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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