The dispute about the external sphincter and the urogenital diaphragm.
J Urol
; 162(6): 1942-5, 1999 Dec.
Article
em En
| MEDLINE
| ID: mdl-10569543
ABSTRACT
PURPOSE:
Basic scientific facts, such as anatomical structures, are rarely subjected to critical reappraisal. Nevertheless, several clinical phenomena exist which are inconsistent with the description of the anatomy of the so-called external sphincter muscle and urogenital diaphragm. MATERIALS ANDMETHODS:
We performed a global examination of the anatomy of the entire lower urinary tract in 50 male autopsy specimens. For comparison magnetic resonance imaging of the same regions was performed on 12 healthy patients.RESULTS:
Direct comparison of the results of both methods revealed the exact same topography of the bladder neck. The external sphincter or musculus sphincter urethrae is an independent morphological unit separated from the surrounding pelvic floor muscles by connective tissue.CONCLUSIONS:
The musculus transversus perinei profundus or deep transverse perineal muscle, which is believed to constitute the major element of the urogenital diaphragm, does not exist. There is histomorphological evidence that the external sphincter consists of a striated (musculus sphincter urethrae transversostriatus) and smooth muscle (musculus sphincter urethrae glaber) component.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Uretra
/
Imageamento por Ressonância Magnética
/
Músculo Liso
Limite:
Adolescent
/
Adult
/
Aged
/
Aged80
/
Child
/
Child, preschool
/
Humans
/
Infant
/
Male
/
Middle aged
Idioma:
En
Revista:
J Urol
Ano de publicação:
1999
Tipo de documento:
Article
País de afiliação:
Alemanha