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| Content Provider | PubMed Central |
|---|---|
| Author | Bajic, Dusica Proudfit, Herbert K. |
| Copyright Year | 2013 |
| Abstract | Stimulation of neurons in the cuneiform nucleus (CnF) produces antinociception and cardiovascular responses that could be mediated, in part, by noradrenergic neurons that innervate the spinal cord dorsal horn. The present study determined the projections of neurons in the CnF to the pontine noradrenergic neurons in the A5, A6 (locus coeruleus), and A7 cell groups that are known to project to the spinal cord. Injections of the anterograde tracer, biotinylated dextran amine in the CnF of Sasco Sprague-Dawley rats labeled axons located near noradrenergic neurons that were visualized by processing tissue sections for tyrosine hydroxylase-immunoreactivity. Anterogradely-labeled axons were more dense on the side ipsilateral to the BDA deposit. Both A7 and A5 cell groups received dense projections from neurons in the CnF, whereas locus coeruleus received only a sparse projection. Highly varicose anterogradely-labeled axons from the CnF were found in close apposition to dendrites and somata of tyrosine hydroxylase-immunoreactive neurons in pontine tegmentum. Although definitive evidence for direct pathways from CnF neurons to the pontine noradrenergic cell groups requires ultrastructural analysis, the results of the present studies provide presumptive evidence of direct projections from neurons in the CnF to the pontine noradrenergic neurons of the A7, locus coeruleus, and A5 cell groups. These results support the suggestion that the analgesia and cardiovascular responses produced by stimulation of neurons in the CnF may be mediated, in part, by pontine noradrenergic neurons. |
| Related Links | http://dx.doi.org/10.1016/j.jchemneu.2013.03.001 |
| Ending Page | 20 |
| Page Count | 10 |
| Starting Page | 11 |
| File Format | |
| ISSN | 08910618 |
| e-ISSN | 18736300 |
| Journal | Journal of chemical neuroanatomy |
| Volume Number | 0 |
| Language | English |
| Publisher Date | 2013-05-01 |
| Access Restriction | Open |
| Subject Keyword | Cellular and Molecular Neuroscience Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cellular and Molecular Neuroscience |
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