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  • 1
    Electronic Resource
    Electronic Resource
    Male-female differences in the intra-amygdaloid input to the medial amygdala (1983)
    Springer
    Experimental brain research 52 (1983), S. 328-332 
    Details
    ISSN: 1432-1106
    Keywords: Amygdala ; Sex difference ; Synapse ; Input ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Following lesion of the posterior cortical nucleus of the amygdala (PCAN), the number of degenerating axon terminals and alterations of synaptic pattern were studied in the molecular layer (ML) of the medial nucleus of the amygdala (MAN) of male and female rats. Semiquantitative analyses by electron microscopy indicated that, 1 and 2 days after the lesion, the number of degenerating terminals in the ventral ML of male rats was statistically greater than that of female rats. Ten days after the operation, intact synapses remaining on dendritic shafts of the medial ML and those on dendritic spines of the ventral ML of male rats significantly decreased in number, compared with unoperated controls. On the other hand, no significant reduction was noted in synapses of the lesioned female rats killed 10 days after the operation. Thus, the number of axon terminals in the male ML originating from the lesioned area was greater than that of the female ML. The number of synapses in the ML of unoperated male rats was statistically greater than that of unoperated females. However, these sex differences in synaptic number became undetectable 10 days after the operation. These findings provide morphological evidence indicating that the fibers from and/or through the PCAN participate in emergence of synaptic sexual dimorphism in the ML of the MAN.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00238027
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Regional difference in sexually dimorphic synaptic organization of the medial amygdala (1983)
    Springer
    Experimental brain research 49 (1983), S. 462-465 
    Details
    ISSN: 1432-1106
    Keywords: Sexual dimorphism ; Dendritic synapses ; Medial amygdala ; Sex steroids ; Sexual differentiation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The existence of sexual dimorphism in synaptic pattern is demonstrated in the molecular layer of the medial nucleus of the rat amygdala by semiquantitative electron microscopic analysis on synaptic density. Sex difference in synaptic number was found in dendritic shaft synapses in the medial part of the molecular layer, whereas the difference occurred in dendritic spine synapses in the ventral molecular layer. The present study also provides evidence for the involvement of sex steroids in the development of sexually dimorphic neuronal circuitry in the molecular layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00238788
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Androgen Enhances Neuronal Degeneration in the Developing Preoptic Area: Apoptosis in the Anteroventral Periventricular Nucleus (AVPvN-POA)
    Amsterdam : Elsevier
    Hormones and Behavior 28 (1994), S. 313-319 
    Details
    ISSN: 0018-506X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1006/hbeh.1994.1027
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Medial preoptic islands in the rat brain: electron microscopic evidence for intrinsic synapses (1989)
    Springer
    Experimental brain research 77 (1989), S. 295-301 
    Details
    ISSN: 1432-1106
    Keywords: Preoptic area ; Intrinsic neuron ; GABA ; Local neuron ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Neurons intrinsic to the preoptic area might participate in the control of neuroendocrine or behavioral events. To determine their existence and features, we deafferented the preoptic area of female rats, using completely circumscribing cuts with a Halasz knife. Despite obvious signs of degeneration of synapses originating from nerve cell bodies outside the preoptic island, some synapses survived complete deafferentation. We saw synaptic contacts not only on the neuronal cell body, but also on the dendritic shaft and spine. There were no peculiar morphological features, as might suggest unique physiologic functions of these intrinsic synapses. The prominence of intrinsic synapses in the preoptic area suggests that, in addition to hormone effects on preoptic neurons, and long ascending afferents, intrinsic synapses might play significant roles in neuroendocrine controls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00274986
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    Paper (German National Licenses)
    Fulltext
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