Anatomical description of the ventral and dorsal cervical rootlets in rats: a microsurgical study
Purpose: To describe the anatomical aspects of the cervical rootlets and to quantify the number of rootlets that compose C1 to T1. Methods: Twenty male rats were used in this study. The dorsal rootlets from C1 to T1 were analyzed. To study the ventral rootlets, the posterior root avulsion was pe...
| Autor principal: | ARAÚJO, Nayara Pontes de |
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| Grau: | Artigo |
| Publicado em: |
2023
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| Assuntos: | |
| Acesso em linha: |
https://bdm.ufpa.br:8443/jspui/handle/prefix/6128 |
| Resumo: |
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Purpose: To describe the anatomical aspects of the cervical rootlets and to quantify the number of rootlets that compose
C1 to T1. Methods: Twenty male rats were used in this study. The dorsal rootlets from C1 to T1 were analyzed. To study the
ventral rootlets, the posterior root avulsion was performed using a microhook, allowing exposure of the ventral roots through
manipulation of the denticulate ligament and arachnoid mater. The parameters analyzed were the number of ventral and dorsal
rootlets by side and level. Results: The formation of the respective spinal nerve was observed in the spinal roots the union of
the ventral and dorsal roots. In four animals the C1 spinal root had no dorsal and/or ventral contribution. There is no normal
pattern of numerical normality of the dorsal and ventral rootlets. The average number of fascicles per root was 4.08, with a slight
superiority on the left side. There was a slight superiority of the dorsal rootlets compared to the ventral rootlets. Conclusions:
This investigation was the first to study cervical rootlets in rats. In 20% of the sample studied, the dorsal root of C1 was absent
mainly on the left side. There is a nonlinear numerical increase from C1 to T1 in the rootlets. There is a numerical predominance
of cervical fascicles on the left side, confronting several studies related to the functional predominance of right laterality, requiring
new studies that correlate these variables. |