[Anatomical study of the verumontanum of the urethra].
Five samples of infra-montanal prostatic urethra, fixed in formalin and stored in liquid nitrogen at -30 degrees C were examined histologically. The results of this study demonstrated that muscle fibres of the striated sphincter extend as far as the level of the veru montanum. The proportion of rapid and slow striated fibres was identical. These striated fibres were mixed with smooth muscle fibres of the urethra. The density of innervation of this muscular tunic was found to increase closer to the striated sphincter; it is composed of equal numbers of adrenergic and cholinergic fibres.
Service d'Urologie, Hôpital de Bicêtre, Le-Kremlin-Bicêtre.
G
G
Benoit
J
J
Quillard
V
V
Delmas
C
C
Gillot
D006801:Humans; D008297:Male; D009130:Muscle, Smooth / Q000033:anatomy & histology; D014521:Urethra / Q000033:anatomy & histology*
Etude anatomique de l'urètre sous-montanal.