Description
"Of the Muscles of the Bladder of Urine.
Galen and the ancient Anatomists take notice of but one Muscle belonging to this Part, viz. the Sphincter, but Fabricius ab Aquapendente mentions another, call'd by Spigelius, Detrusor Urinae, from its Use" (Cowper, 1724, Chap. IV).
Source
Myotomia reformata, or, An anatomical treatise on the muscles of the human body. Illustrated with figures after the life. By the late Mr. William Cowper ... To which is prefix’d an introduction concerning muscular motion (London, R. Knaplock [etc.] 1724).