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  • Articles  (2)
  • Splanchnic nerve  (2)
  • Avian adrenal medulla  (1)
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  • Articles  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Influence of age and splanchnic nerve on glucagon-induced changes of adrenomedullary catecholamine content and blood glucose level in the avian group (1991)
    Springer
    Journal of comparative physiology 161 (1991), S. 532-536 
    Details
    ISSN: 1432-136X
    Keywords: Avian adrenal medulla ; Catecholamine ; Blood glucose ; Age ; Splanchnic nerve ; Glucagon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Glucagon (0.1 mg · 100 g body wt-1) increased norepinephrine (NE) content in adult pigeon (31%) and parakeet (58%), decreased NE content in the adrenal medulla of newly-hatched pigeon (36%), parakeet (52%), and crow (44%) 0.5 h after treatment. Epinephrine (E) content decreased to 26% and 59% of control values, respectively, in newly-hatched pigeon and parakeet 0.5 h after treatment. Glucagon produced hyperglycemia irrespective of age and species. The results indicate that aging modulates glucagon-induced changes of catecholamine (CA) content. In the innervated (I) adrenal gland of pigeon, glucagon caused a 31% increase of NE content 0.5 h after injection, a 46% decrease of NE content 12 h after injection, and a 192% increase of NE 24 h after injection. In the I gland of pigeons, glucagon also caused a 61% decrease of E content 4 h after injection, and brought about a 100% increase of E 24 h after injection. Glucagon-induced changes of CA content differ significantly between the I and denervated (D) glands. The results indicate that the splanchnic nerve regulates release and/or resynthesis of CA induced by glucagon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00257909
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  • 2
    Electronic Resource
    Electronic Resource
    Role of splanchnic nerve on steroid-hormone-induced alteration of adrenomedullary catecholamines in untreated and reserpinized pigeon (1991)
    Springer
    Journal of comparative physiology 161 (1991), S. 598-601 
    Details
    ISSN: 1432-136X
    Keywords: Steroid hormones ; Reserpine ; Catecholamine ; Adrenal medulla ; Splanchnic nerve ; Pigeon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The aim of the present investigation was to ascertain (1) the effect of steroid hormones (corticosterone, dexamethasone, deoxycorticosterone, progesterone, testosterone and oestrogen) on the neural regulation of adrenomedullary catecholamine (CA) content, and (2) the neural modulation of the effect of glucocorticoid hormones (corticosterone and dexamethasone) on reserpine-induced resynthesis of CA. The experiment was conducted on unilaterally splanchnic-denervated pigeons. The findings revealed that 7 consecutive days of steroid treatments (2.5 mg·kg b.w.-1, i.m.) resulted in significant changes of CA content. Interestingly, the changes of epinephrine (E) content differed significantly between the innervated and denervated glands. This clearly indicates that the splanchnic nerve regulates steroid-induced alterations of E content in the pigeon. The results further revealed that the glucocorticoid hormones augmented reserpine-induced resynthesis of CA specifically in the innervated glands. This confirms that the splanchnic nerve is essential for the synergistic action of glucocorticoids and reserpine in accelerating resynthesis of CA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00260750
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    Paper (German National Licenses)
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