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  • Cell & Developmental Biology  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Retinofugal projections of an echolocating megachiropteran (1981)
    New York, NY [u.a.] : Wiley-Blackwell
    American Journal of Anatomy 160 (1981), S. 159-174 
    Details
    ISSN: 0002-9106
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: The projection leading from the eye and the nuclear targets of the projection to the brainstem were identified in an echolocating megachiropteran (Rousettus aegyptiacus) following unilateral intraocular injections of radioactive amino acids. In the hypothalamus, the projection ended bilaterally in suprachiasmatic nuclei. In the ventral thalamus, it ended bilaterally in external and internal divisions of the ventral lateral geniculate nuclei. In the dorsal thalamus, the projection terminated bilaterally in the dorsal lateral geniculate nuclei and contralaterally in the lateral posterior nucleus. Input from the two eyes was segregated to laminae in the lateral division of the dorsal lateral geniculate nucleus. The contralateral projection ended in the dorsolateral and ventral portions of lamina 1, in lamina 2, the ventral portions of lamina 3, and an interlaminar fiber plexus. The ipsilateral projection ended in the dorsomedial portion of lamina 1, the dorsal portion of lamina 3, and the most superficial portion of lamina 1. Contralateral and ipsilateral input to the medial division of the dorsal lateral geniculate nucleus was for the most part segregated. The projection to the pretectum terminated in nuclei of the optic tract, pretectal olivary nuclei, and posterior pretectal nuclei. Although the input to the pretectal nuclei was bilateral, the contralateral projection was greater. The contralateral projection to the superior colliculus terminated throughout the rostral-caudal extent of the superficial gray layer. The ipsilateral projection to the superior colliculus ended in the superficial gray layer in the middle one-third of the superior colliculus only. On the contralateral side the projection to the outer portion of the superficial gray layer was especially heavy. The superior fascicle of the accessory optic tract was identified. It was traced to dorsal, lateral, and medial accessory optic nuclei. These results indicate that the visual system of Rousettus is more extensive than that of the echolocating microchiroptera and that it is similar to that described for nonecholocating Pteropus.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aja.1001600203
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Retinofugal projections of the big brown bat, Eptesicus fuscus and the neotropical fruit bat, Artibeus jamaicensis (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    American Journal of Anatomy 172 (1985), S. 105-124 
    Details
    ISSN: 0002-9106
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: Retinal connections were studied in Eptesicus fuscus and Artibeus jamaicensis using anterograde axonal degeneration and autoradiographic techniques following unilateral enucleations and uniocular injections of radioactive amino acids. Although each retina projected bilaterally to the brainstem, the number of silver grains in the emulsion of autoradiographs indicated that nearly all fibers in the optic nerve entered the contralateral optic tract. Ipsilaterally, a major portin of the projection ended in the suprachiasmatic nucleus; caudal to the suprachiasmatic nucleus, the amount of label was so small that individual silver grains were counted to determine the location and quantity of lebel in other ipsilateral nuclei. In both species the retinal projection terminated bilaterally in the suprachiasmatic, dorsal lateral geniculate, ventral lateral geniculate, and pretectal olivary nuclei and contralaterally in the posterior pretectal nucleus, superficial gray layers of the superior colliculus, and nuclei of the accessory optic system. In Eptesicus the projection to the nucleus of the optic tract ended contralaterally, and in Artibeus it ended in this nucleus bilaterally. The results of this study revealed a basic theme in the optic projection of the two ecologically different microchirop. terans. The results differed, however, in that the projection was larger and visually related nuclei were better developed in Artibeus. Such variations are presumed to relate to eye size and the relative use of vision by the two chiropterans.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aja.1001720202
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  • 3
    Electronic Resource
    Electronic Resource
    Distribution of somatostatinlike immunoreactivity in the brain of the little brown bat (Myotis lucifugus) (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    American Journal of Anatomy 180 (1987), S. 280-294 
    Details
    ISSN: 0002-9106
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: The distribution of somatostatinlike immunoreactive (SLI) perikarya, axons, and terminals was mapped in subcortical areas of the brain of the little brown bat, Myotis lucifugus, using light microscopic immunocytochemistry. A preponderance of immunoreactivity was localized in reticular, limbic, and hypothalamic areas including: (1) in the forebrain: the bed nucleus of the stria terminalis; lateral preoptic, dorsal, anterior, lateral and posterior hypothalamic areas; amygdaloid, periventricular, arcuate, supraoptic, suprachiasmatic, ventromedial, dorsomedial, paraventricular, lateral and medial mammillary, and lateral septal nuclei; the nucleus of the diagonal band of Broca and nucleus accilmbens septi; (2) in the midbrain: the periaqueductal gray, interpeduncular, dorsal and ventral tegmental, pretectal, and Edinger-Westphal nuclei; and (3) in the hindbrain: the superior central and parabrachial nuclei, nucleus incertus, locus coeruJeus, and nucleus reticularis gigantocellularis. Other areas containing SLI included the striatum (caudate nucleus and putamen), zona incerta, infundibulum, supramammiilary and premammillary nuclei, medial and dorsal lateral geniculate nuclei, entopeduncular nucleus, lateral habenular nucleus, central medial thalamic nucleus, central tegmental field, linear and dorsal raphe nuclei, nucleus of Darkschewitsch, superior and inferior colliculi, nucleus ruber, substantia nigra, mesencephalic nucleus of V, inferior olivary nucleus, inferior central nucleus, nucleus prepositus, and deep cerebellar nuclei. While these results were similar in some respects to those previously reported in rodents, they also provided interesting contrasts.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aja.1001800309
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    Paper (German National Licenses)
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