Corpus: Detrusor muscle
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Synonyms: Detrusor, detrusor muscle, "urinary expulsion"
'''English , detrusor urinae muscle
Definition[Bearbeiten]
The detrusor vesicae muscle is the roughly bundled, three-dimensional network of smooth muscle cells in the bladder wall whose contraction leads to the emptying of the bladder (micturition).
Anatomy[Bearbeiten]
There are three histological layers of the detrusor vesicae muscle. From the inside to the outside they are called:
- Stratum longitudinale internum: inner longitudinal muscle layer
- Stratum circulare: middle, circularly arranged muscle layer
- Stratum longitudinale externum: outer longitudinal muscle layer
The outer fibres of the detrusor vesicae muscle extend dorsally into the vesicoprostatic or vesicovaginal muscle and ventrally into the pubovesical muscle.
Innervation[Bearbeiten]
The innervation of the detrusor vesicae muscle is predominantly parasympathetic via the hypogastric plexus inferior.