What question did this study set out to answer?

The aim is to understand the role of the trigonal muscle in the mechanism of micturition and its anatomical relationship with vesical sphincters.

The Anatomy and Surgery of the Trigon

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Randomized trial examines trigonal muscle function in micturition, indicating its role in urinary obstruction.

The aim is to understand the role of the trigonal muscle in the mechanism of micturition and its anatomical relationship with vesical sphincters.
Endoscopic and cystoscopic studies were conducted to observe the contraction of the trigonal muscle.
Cases of urinary obstruction were analyzed to observe compensatory hypertrophy and atrophy of the trigonal muscle.
Trigonal muscle contraction pulls open the vesical orifice during micturition, enhancing urinary flow.
Obstruction leads to compensatory hypertrophy of the trigonal muscle, whereas removal results in atrophy.
Marked obstruction may cause dissection of the hypertrophied muscle from the bladder wall.

Hugh H. Young (1921) studied this question.

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