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The fibers which form a sling for the rectum are named the Puborectalis.

They arise from the lower part of the pubic symphysis, and from the superior fascia of the urogenital diaphragm.

They meet with the corresponding fibers of the opposite side around the lower part of the rectum, and form for it a strong sling. Relaxation increases the angle between rectum and anus, allowing defecation in conjunction with relaxation of the internal and external anal sphincters.

Puborectalis is part of the levator ani muscle.

References

^ Wallner C, Maas C, Dabhoiwala N, Lamers W, Deruiter M (2006). "Evidence for the innervation of the puborectalis muscle by the levator ani nerve.". Neurogastroenterol Motil 18 (12): 1121–2. doi:10.1111/j.1365-2982.2006.00846.x. PMID 17109696.

External links

pelvis at The Anatomy Lesson by Wesley Norman (Georgetown University)
Anatomy photo:43:16-0200 at the SUNY Downstate Medical Center - "The Female Pelvis: Muscles of the Pelvic Diaphragm"
Anatomy photo:44:12-0200 at the SUNY Downstate Medical Center - "The Male Pelvis: Muscles of the Pelvic Diaphragm"

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UpToDate Contents

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5. 成人における便失禁：疫学および評価 fecal incontinence in adults etiology and evaluation

English Journal

Minimal criteria for the diagnosis of avulsion of the puborectalis muscle by tomographic ultrasound.

Dietz HP, Bernardo MJ, Kirby A, Shek KL.SourceSydney Medical School Nepean, Penrith, Australia, hpdietz@bigpond.com.
International urogynecology journal and pelvic floor dysfunction.2011 Jun;22(6):699-704. Epub 2010 Nov 24.
PMID 21107811

Changes in quality of life during biofeedback for people with puborectalis dyssynergia: generic and disease-specific measures.

Zhu FF, Lin Z, Lin L, Wang MF.SourceFen-Fen Zhu MN RN Assistant Su Zhou Health College Jiangsu Province China Zheng Lin MN RN Professor and Associate Director Nursing School of Nanjing Medical University and Nursing Department of the First Affiliated Hospital of Nanjing Medical University Jiangsu Province China Lin Lin PhD Professor Department of Gastroenterology The First Affiliated Hospital of Nanjing Medical University Jiangsu Province China Mei-Feng Wang BN RN Psychological Counselor Gastrointestinal Motility Center The First Affiliated Hospital of Nanjing Medical University Jiangsu Province China.
Journal of advanced nursing.2011 Jun;67(6):1285-1293. doi: 10.1111/j.1365-2648.2010.05593.x. Epub 2011 Feb 17.
zhu f.-f, lin z., lin l. & wang m.-f. (2011)?Changes in quality of life during biofeedback for people with puborectalis dyssynergia: generic and disease-specific measures. Journal of Advanced Nursing67(6), 1285-1293. ABSTRACT: Aim.? The aim of the study was to evaluate the changes in symptom
PMID 21323980

Japanese Journal

完全直腸脱，不完全直腸脱に対する内肛門括約筋後方形成手術

大見良裕,大見琢磨,大見究磨
日本大腸肛門病学会雑誌 66(6), 397-405, 2013
目的：完全直腸脱30例，不完全直腸脱12例に当院で施行した内肛門括約筋後方形成手術（(1)肛門管の後壁側の内肛門括約筋を大きく肛門管内腔側に翻転させて肛門管内腔を狭くする．(2)恥骨直腸筋，浅・深外肛門括約筋を寄せて縫合する．）を行い，その効果を検討した．<BR>結果：手術後の観察期間は不完全直腸脱では平均1年9ヵ月，完全直腸脱では平均3年3ヵ月である．<BR>再発は不完全 …
NAID 130003369861

解剖・病態に則した後方複雑痔瘻のスタンダード手術

栗原浩幸,金井忠男,石川徹,金井慎一郎,張文誠,金井亮太
日本大腸肛門病学会雑誌 62(10), 879-885, 2009-10-01
病態：後方複雑痔瘻の原発口は通常後方正中の肛門小窩である．1次瘻管は内括約筋を頭側に斜走して原発巣に至る．原発巣は肛門後方正中部で，上方を腱様の恥骨直腸筋，底部を内括約筋，下方と側方を外括約筋に囲まれた部位である後方深部隙に存在する．後方深部隙の膿瘍の圧が高まると外側の坐骨直腸窩に膿瘍は進展する．坐骨直腸窩は坐骨直腸窩中隔によって高位と低位に区分され，膿瘍が外括約筋を深いところで貫くと高位，浅いと …
NAID 10025594288

直腸粘膜脱症候群 (mucosal prolapse syndrome) の診断と治療

藤沼澄夫,掛村忠義,佐藤浩一郎,飯田努,三枝善伯,平畑光一,鴫山文子,古畑司,前谷容
日本消化器内視鏡学会雑誌 = Gastroenterological endoscopy 50(12), 3010-3018, 2008-12-20
… The reasons for straining at stool are also obscure, but there is electromyographic evidence in many cases of a failure in the normal mechanisms in the pelvic floor which control continence and def aecation, and in particular the activity of the puborectalis muscle (paradoxical contraction). …
NAID 10024847752

Related Pictures

The Pelvic Floor - TeachMeAnatomy Pleasure and Control:An Exploration of Levator Ani - Fundamentals Of Movement Levator Ani - Anatomy, Function & Innervation | Kenhub Colorectal Conference 7/21/05 Peter M. Kaye, M.D. - ppt video online download What Is My Puborectalis Muscle? - Squat Easy 17 Best images about med on Pinterest | Respiratory therapy, Cartoon and Abs Puborectalis muscle (Musculus puborectalis) | Kenhub Αποτέλεσμα εικόνας για puborectalis muscle | uterus | Anatomy

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「恥骨直腸筋」

Puborectalis muscle
	The posterior aspect of the rectum exposed by removing the lower part of the sacrum and the coccyx. (Puborectalis not labeled, but levator ani labeled at bottom right, and external anal sphincter labeled at bottom center.)
	Left Levator ani from within. (Puborectalis not labeled, but 'levator ani' labeled at center, and anal canal labeled at bottom center.)
Details
Origin	lower part of the pubic symphysis, superior fascia of the urogenital diaphragm
Nerve	S3, S4. levator ani nerve
Actions	inhibit defecation
Identifiers
Latin	musculus puborectalis
Dorlands; /Elsevier	m_22/12550328
TA	A04.5.04.007
FMA	19091
	Anatomical terms of muscle [edit on Wikidata]