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. 2022 Dec 31;13(1):139. doi: 10.3390/diagnostics13010139

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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US images and schematic drawings of (A) the obturator internus, (B) the inferior gemellus and (C) the quadratus femoris and obturator externus muscles. GMA: gluteus maximus muscle; IS: ischial spine; OI: obturator internus muscle, light brown color; SN: sciatic nerve; IG: inferior gemellus muscle, gray color; QF: quadratus femoris muscle, yellow color; OE: obturator externus muscle, green shade; LT: lesser trochanter; IT: ischial tuberosity; ST: semitendinosus; SM, semimembranosus muscle.