Journal of Neurogastroenterology and Motility : eISSN 2093-0887 / pISSN 2093-0879

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Fig. 3. Structural abnormalities of the puborectalis muscle, internal anal sphincter (IAS), and external anal sphincter (EAS), in the deep, superficial, and subcutaneous levels along the anal canal. Note the predominance of muscle damage in the upper right quadrant.
Journal of Neurogastroenterology and Motility 2019;25:423~435 https://doi.org/10.5056/jnm18196
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