Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/1663
Título: | Brain afferents to the lateral caudal ventrolateral medulla : a retrograde and anterograde tracing study in the rat |
Autor(es): | Cobos, Angeles Lima, Deolinda Almeida, Armando Tavares, Isaura |
Palavras-chave: | Pain modulation Motor control Cardiovascular regulation Cholera toxin subunit B Biotinylated dextran amine |
Data: | 2003 |
Editora: | Elsevier Science |
Revista: | Neuroscience |
Citação: | "Neuroscience". ISSN 0306-4522. 120 (2003) 485–498. |
Resumo(s): | The ventrolateral medulla (VLM) modulates autonomic functions, motor reactions and pain responses. The lateralmost part of the caudal VLM (VLMlat) was recently shown to be the VLM area responsible for pain modulation. In the present study, the brain sources of VLMlat afferent fibers were determined by tract-tracing techniques. Following injection of cholera toxin subunit B into the VLMlat, retrogradely labeled neurons in the forebrain occurred at the somatosensory, insular, motor, limbic and infralimbic cortices, and at the central amygdaloid nucleus. Retrogradely labeled neurons in diencephalic regions were observed in the lateral hypothalamus, posterior hypothalamus and paraventricular nucleus. In the brainstem, retrograde labeling occurred at the periaqueductal gray, red nucleus, parabrachial area, nucleus raphe magnus, nucleus tractus solitarii, lateral reticular nucleus and dorsal and ventral medullary reticular formation. In the cerebellum, retrogradely labeled neurons occurred at the lateral nucleus. Following injections of the anterograde tracer biotinylated dextran amine (BDA) into the lateral hypothalamus or paraventricular nucleus, anterogradely labeled fibers were mainly observed in the VLMlat. Injections of BDA into the periaqueductal gray, red nucleus or lateral nucleus of the cerebellum resulted in anterograde labeling in the VLMlat and lateral reticular nucleus. The present study gives an account of the brain regions putatively involved in triggering the modulatory actions elicited from the VLMlat. These include areas committed to somatosensory processing, autonomic control, somatic and visceral motor activity and affective reactions. The findings suggest that the VLMlat may play a major homeostatic role in the integration of nociception with other brain functions. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/1663 |
DOI: | 10.1016/S0306-4522(03)00209-4 |
ISSN: | 0306-4522 |
Versão da editora: | http://www.elsevier.com/wps/find/journaldescription.cws_home/468/description?navopenmenu=-2 http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6T0F-491RN5R-2-H&_cdi=4861&_user=2459786&_orig=search&_coverDate=08%2F22%2F2003&_sk=998799997&view=c&wchp=dGLbVtz-zSkzV&md5=99d09da7ef426fa4e016af855f63a29c&ie=/sdarticle.pdf |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | ICVS - Artigos em revistas internacionais / Papers in international journals |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Isa -2003.pdf | 1,09 MB | Adobe PDF | Ver/Abrir |