The neuronal and extra-neuronal localisations of biogenic amines in the cervical region of the domestic fowl (Gallus Gallus domesticus L.) |
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Authors: | Terence Bennett |
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Institution: | (1) Department of Zoology, University of Melbourne, Australia |
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Abstract: | Summary The Falck-Hillarp technique has been used to demonstrate the neuronal and extra-neuronal localisations of biogenic amines
in the cervical region of the domestic fowl. Adrenergic cell bodies were found in the superior cervical ganglion and in the
ganglia of the cervical paravertebral chain. The axons of the latter ran into the corresponding spinal nerves and thus to
the periphery. Very few adrenergic fibres were found in the interganglionic portions of the cervical paravertebral chain.
The precarotid branch of the glossopharyngeal nerve, and the vagus nerve, below its junction with the former, contained numbers
of adrenergic fibres. The retrocarotid nerve-trunk from the superior cervical ganglion was composed of adrenergic fibres.
With the exception of the parathyroid gland, the adrenergic nerves seen in the branchial derivatives (thymus, thyroid and
ultimobranchials) appeared to be associated with blood vessels. Under normal conditions the cells of the ultimobranchial body
were nonfluorescent, but after injection of 6-hydroxydopamine the cells were brightly fluorescent. The carotid body was devoid
of adrenergic nerves other than those with blood vessels, but the cells of the carotid body were brightly fluorescent. Various
fluorescent cell types were found throughout the cervical region, particularly in association with the vasculature.
I should like to thank Prof. G. Burnstock (Department of Zoology, Melbourne University) in whose department this work was
carried out and Dr. R. D. Hodges (Wye College, London University) for his indispensable advice on the disposition of the avian
ultimobranchial body.
The author held a Postdoctoral Research Fellowship of the National Heart Foundation of Australia during part of this study. |
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Keywords: | Cervical region Biogenic amines Gallus gallus dom Adrenergic nerves SIF cells |
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