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  • 1
    Electronic Resource
    Electronic Resource
    Identification of geniculo-tectal relay neurons in the rat's ventral lateral geniculate nucleus (1982)
    Springer
    Experimental brain research 45 (1982), S. 84-88 
    Details
    ISSN: 1432-1106
    Keywords: Rat ; vLGN ; Geniculo-tectal relay cells ; HRP ; Golgi-method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In the rat's ventral lateral geniculate nucleus (vLGN), geniculo-tectal relay neurons (GTR-neurons) could be identified by the retrograde transport of horseradish peroxidase (HRP) after injection in the superior colliculus (SC). GTR-neurons correspond to class III cells described by Brauer and Schober (1973) in Golgi preparations of the rat's vLGN. The distribution of GTR-neurons is restricted to the lateral subnucleus of vLGN. According to Swanson et al. (1974), the axons of these cells terminate in lower Stratum griseum superficiale and in Stratum opticum, Stratum griseum intermedium and Stratum album intermedium of SC. The GTR-neurons are characterized by very thick and long proximal dendritic segments which have a smooth surface. Dendrites branch preponderantly in their distal regions and only in this part form many multiform protrusions. There is some evidence that retinal axons terminate on these dendritic surface structures. The supposed differences in the afferent patterns between GTR-neurons in the vLGN and geniculo-cortical relay neurons in the dorsal lateral geniculate nucleus are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00235765
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Two morphologically different types of retinal axon terminals in the rat's dorsal lateral geniculate nucleus and their relationships to the X- and Y-channel (1979)
    Springer
    Experimental brain research 36 (1979), S. 523-532 
    Details
    ISSN: 1432-1106
    Keywords: Rat ; dLGN ; Retinal afferents ; X- and Y-channel ; Geniculo-cortical relay cells ; HRP
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In the rat's dorsal lateral geniculate nucleus (dLGN) two types of retino-geniculate axon terminals have been visualized electron microscopically in adult and juvenile material as well as in Golgi-Kopsch and Golgi-Rapid impregnated sections. The two types differ in size and number of boutons. 2a-terminals have large, sparse boutons, mainly connected with branching zones of geniculo-cortical relay cells (GCR cells). 2b-terminals bear numerous small boutons forming simple contacts with more distal segments of GCR cell dendrites. We are not able to give any information about participation of either type in complex synaptic zones. After horseradish peroxidase (HRP) injection in the superior colliculus optic tract fibres and lateral fibre bundles in the dLGN are labelled with reaction product. Besides these tracts the terminal branching zones of retino-tectal fibre collaterals in the dLGN also show reaction product. As a result of the good visualization of these retinal terminals by the HRP-method they are identified as 2a-terminals. We conclude that 2a-terminals may represent the Y-channel projecting from the retina to both the superior colliculus and the dLGN.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00238520
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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