circular layer of detrusor (muscle) of urinary bladder
the substantial middle layer of three ill-defined, interlacing layers (the inner and outer layers being predominantly longitudinally oriented) of smooth (involuntary) muscle fibers constituting the muscle layer of the wall of the bladder.
Synonym(s): stratum circulare musculi detrusoris vesicaeTA
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Examples: glitazone, GI cocktail, etc.