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Master's Dissertation
DOI
10.11606/D.10.1997.tde-21022008-092052
Document
Author
Full name
Rosa Helena dos Santos Ferraz
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 1997
Supervisor
Committee
Prada, Irvênia Luiza de Santis (President)
Peduti Neto, José
Silva, José Alberto Pereira da
Title in Portuguese
Estudo anatômico do comportamento do nervo pudendo em fetos de bovinos azebuados
Keywords in Portuguese
Anatomia
Bovinos
Cavidade pélvica
Nervo pudendo
Nervos sacrais
Abstract in Portuguese
Para a execução deste trabalho, valemo-nos de trinta fetos de bovinos azebuados, fêmeas. Após o processo de conservação e de redução das peças, realizamos sua dissecção, com auxílio de instrumentos de cirurgia oftálmica e lupa circular de luz fria. Priorizamos a observação da origem do tronco do nervo pudendo registrando-a, maus freqüentem ente (76,7%) em relação ao segundo, terceiro e quarto nervos sacrais, destacando como contribuição mais conspícua, a que se refere ao terceiro nervo sacra (90%). Especificamos também as contribuições dos ramos ventrais dos nervos sacrais destinadas a cada um dos ramos, registrando participação mais freqüentemente do terceiro e quartos nervos, isto é: cutâneo proximal (56,7% à direita e 53,3% à esquerda), cutâneo distal (70% à direita e 56,7% à esquerda) e nervo pudendo (propriamente dito - 76,7% à direita e 73,3% à esquerda), considerandoo-os enquanto contidos na cavidade pélvica. Registramos o número de ramos representativos dos ramos cutâneos proximal e dista], sendo respectivamente encontrado em apresentação única à direita (63,3% - 96,7%) e à esquerda (66,7% - 83,3%); dupla à direita (23,3% - 3,3%) e à esquerda (23,3% - 16,7%) e tripla, exclusivamente para o ramo cutâneo proximal à esquerda (3,3%). Observamos também a emergência desses ramos da cavidade pélvica, representada para o ramo cutâneo proximal mais freqüentemente através do forame isquiático menor à direita (16,7%) e à esquerda (16,7%) oou perfurando o ligamento sacrotuberal largo à direita (46,7%) e à esquerda (50%) e, para o ramo cutâneo distal pela fossa ísquio-retal para ambos os antímeros (100%). 0 nervo pudendo (propriamente dito), no terço final da cavidade pélvica, origina sempre o ramo dorsal do clitóris e o ramo mamário (100%). Registramos ainda, ocorrência de ramo conectivo ("anastomose") entre um pequeno ramo que adentra a cavidade pélvica pela porção cranial do forame isquiático menor e o nervo pudendo (propriamente dito) ou um de seus ramos - o nervo perineal profundo (63,3%). Os resultados obtidos em relação ao comportamento do nervo pudendo em fetos de bovinos azebuados, fêmeas, de modo geral, não mostram discordância com os correspondentes dados obtidos na literatura consultada, referentes a bovinos de origem européia.
Title in English
Anatomical study on the behavior of the pudendum nerve in fetuses of the crossbred zebu cattle
Keywords in English
Allowing nerve
Anatomy
Cattle
Pelvic cavity
Sacral nerves
Abstract in English
In order to perform this research, 30 female fetuses from crossbred zebus were used. After applying the process of conservation and reduction of the pieces, dissections were made by using ophthalmic surgical instruments and circular magnifying glass fitted with cold lamp. Priority was given to the observation of the origin of the pudendum nerve trunk registering it, more frequently, in relation to the second, third and fourth sacral nerves (76.7%), emphasizing it as the most remarkable contribution, the one that refers to the third sacral nerve (90%). While enclosed in the pelvic cavity, we considered contributions of the ventral branches of the sacral nerves, specifically destinated to each of the branches, registering more abundantly participation of the third and fourth nerves, that is: proximal cutaneous (56.7% to the right and 53.3% to the left), distal cutaneous (70% to the right and 56.7% to the left) and pudendum nerve (properly speaking - 76.7% to the right and 73.3% to the left). We registered the number of branches representative of the proximal cutaneous and of the distal cutaneous, being respectively found in the unique appearance to the right si de (63.3% and 96.7%) and to the left (66.7% and 83.3%); double to the right (23.3% and 3.3.%) and to the left (23.3% and 16.7%), and triple, exclusively to the proximal cutaneous branch to the left (3.3%). The emergence of these branches from the pelvic cavity was also observed, represented to the proximal cutaneous branch more often through the minor ischiatic foramen to the right (16.7%) and to the left (16.7%) or perforating the large sacrotuberal ligament to the right (46.7%) and to the left (50%) and, to the distal cutaneous branch through ischiorectal fossa to both antimeres (100%). The pudendum nerve (properly speaking), in the final one-third of the pelvic cavity, always originates the dorsal branch of the clitoris and the mammary branch (100%). The occurrence of the comiective branch ("anastomosis") between a small branch entering into the pelvic cavity through the cranial portion of the minor ischiatic foramen (properly speaking) and the pudendum nerve or one of its branches - the deep pudendum nerve was also observed (63.3%). The results of the behavior of the pudendum nerve found in female fetuses of the crossbred zebu cattle did not differ from those of the Europen cattle, as described in the literature.
 
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Publishing Date
2008-03-06
 
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