Size and number of binucleate and mononucleate superior cervical ganglion neurons in young capybaras

Autor(es)

Ribeiro, Antonio Augusto Coppi Maciel ^[1]

Afiliação do(s) autor(es)

^[1] Universidade de São Paulo (USP). Faculdade de Medicina Veterinária e Zootecnia - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Anatomy and Embryology; v. 211, n. 6, p. 607-617, Nov. 2006.
• Área do conhecimento: Ciências Biológicas - Morfologia
• Assunto(s): Anatomia animal Neurônios Mamíferos silvestres Capivaras

Resumo

The total number of neurons in the superior cervical ganglion (SCG) of adult capybaras is known from a previous study, where a marked occurrence of binucleate neurons (13%) was also noted. Here, distribution, number and fate of binucleate neurons were examined in younger, developing capybaras, aged 3 months. The mean neuronal cross-sectional area was 575.2 um2 for mononucleate neurons and 806.8 um2 in binucleate neurons. Frequency of binucleate neurons was about 36%. The mean ganglion volume was about 190 mm3 in young capybaras and the mean neuronal density was about 9,517 neurons/mm3. The total number of neurons per ganglion was about 1.81 mill. Neuronal cell bodies constituted 22.5% of the ganglion volume and the average neuronal volume was 23,600 um3. By comparing the present data with those previously published the conclusion is drawn that the maturation period was characterized by the following points: a 26% remarkable decrease in neuronal density which was significant (P < 0.05) and a significant 16% (P < 0.05) decrease in the total number of SCG neurons accompanied by a 23% decrease in the total number of SCG binucleate neurons. (AU)

• Processo FAPESP: 04/02357-4 - Study of the neuroplasticity and innervations of cerebral vessels in capybaras and rats during ageing: a possible model for stroke
• Beneficiário: Antonio Augusto Coppi Maciel Ribeiro
• Modalidade de apoio: Bolsas no Exterior - Pesquisa