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  • 1
    Electronic Resource
    Electronic Resource
    Retinal projections to the accommodation-related area in the rostral superior colliculus of the cat (1997)
    Springer
    Experimental brain research 113 (1997), S. 169-173 
    Details
    ISSN: 1432-1106
    Keywords: Accommodation ; Superior colliculus ; γ-Cell ; W-cell ; Active fixation ; Cat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Results of previous studies have indicated that the rostral superior colliculus (SC) plays an important part in the control of accommodation. The present study was carried out to investigate retinal projections to the accommodation-related area in the rostral SC. We injected WGA-HRP into the accommodation-related area in the rostral SC of the cat, where accommodative responses were elicited by stimulation with weak currents of less than 20 μA. Following injection of WGA-HRP into the accommodation-related area in the rostral SC, retrogradely labeled ganglion cells were observed mainly in the area centralis. Projections from the contralateral eye were denser than those from the ipsilateral eye. Almost all retrogradely labeled cells were classified as γ-cells owing to their small cell-body diameters and thin dendrites, although a few were classified as α-cells. These findings suggest that the accommodation-related area in the rostral SC is located in the portion corresponding to the area of representation of the central visual field and receives mainly γ-cell projections
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02454154
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Photographic Observations of the 1996 Leonid Fireballs in Japan (1997)
    Springer
    Earth, moon and planets 77 (1997), S. 47-54 
    Details
    ISSN: 1573-0794
    Keywords: Meteors ; meteor showers ; individual (Leonids) ; comets ; dust trail
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Several Leonid fireballs were successfully photographed by the Japanese Fireball Network and by other observers in Japan on 16 November, 1996. A totals of seven of these were simultaneously observed from two or more stations, from which the orbital and physical data were deduced. The radiant of these fireballs were very small, only 0.1°, similar to that of the 1991 Perseids. The 1996 Leonids showed a lower magnitude distribution index similar to those obtained in the 1961 and 1965 Leonids. All of these showers occurred before perihelion passage of the parent comet. We conclude that we have already encountered the elongated front part of the dust trail of the Leonid parent comet, where the trail is probably composed of larger dust particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006118927770
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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