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Muscles of the Pelvic Floor and Perineum

Muscles of the Pelvic Floor and Perineum

The muscles of the pelvic floor and perineum are crucial for supporting the pelvic organs, controlling continence, and aiding in sexual function, childbirth, and core stability. They are typically divided into the superficial perineal layer and the deep pelvic floor layer.
Perineal Layer
The perineum is a diamond-shaped area below the pelvic diaphragm, divided into an anterior urogenital triangle that contains the external genitals and a posterior anal triangle housing the anus. The urogenital...

Uterus and Cervix

Uterus and Cervix

The uterus, commonly called the womb, is a vital reproductive organ in females designed to provide a nurturing environment for the implantation and growth of an embryo. It is shaped like a hollow pear and positioned between the urinary bladder and the rectum. The uterus's structure allows it to support and protect a developing fetus throughout pregnancy.
The uterus is securely anchored within the pelvic cavity by paired broad ligaments on either side. It is further stabilized by three pairs of...

Anatomy of the Genitourinary System II: Bladder and Urethra

Anatomy of the Genitourinary System II: Bladder and Urethra

The lower urinary system consists of the urinary bladder and urethra, which are essential in storing and expelling urine from the body. Together with the internal and external sphincters, these structures work together to regulate urination effectively.Anatomy of the BladderThe urinary bladder is a muscular, stretchable organ behind the pubic bone and in front of the rectum. In females, the bladder is positioned anterior to the vagina and inferior to the uterus, while in males, it is located...

Assessment of the Rectum and Anus

Assessment of the Rectum and Anus

Evaluating the rectum and anus plays a crucial role in conducting a thorough physical examination of the gastrointestinal system. Although it may be uncomfortable and often embarrassing for the patient, it holds immense diagnostic value, particularly in detecting gastrointestinal diseases and abnormalities. This guide will explain how to perform this assessment using inspection and palpation methods.
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...

Abdominal Regions and Quadrants

Abdominal Regions and Quadrants

To promote clear communication, for instance, about the location of a patient's abdominal pain or a suspicious mass, anatomists and clinicians typically use imaginary lines to categorize the abdominopelvic cavity into either four quadrants or nine regions to identify organs in the cavity.
The simpler quadrants approach, which is more commonly used in medicine, subdivides the cavity with one horizontal and one vertical line that intersects at the patient's umbilicus (navel). The four quadrants...

Anatomical Positions

Anatomical Positions

In anatomy, several standard anatomical positions are used as references for describing the position and orientation of different body parts. These positions help provide a common frame of reference when discussing anatomical structures. The anatomical position is the standard reference point for describing the body's position and orientation. In this position:
The body is upright, facing forward, and standing erect.
The feet are parallel and flat on the floor.
The arms are hanging by the...

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Related Experiment Video

Updated: May 16, 2026

Quantification of Levator Ani Hiatus Enlargement by Magnetic Resonance Imaging in Males and Females with Pelvic Organ Prolapse

Quantification of Levator Ani Hiatus Enlargement by Magnetic Resonance Imaging in Males and Females with Pelvic Organ Prolapse

Published on: April 17, 2019

New insights into the pelvic organ support framework.

Tanvaa Tansatit¹, Prawit Apinuntrum, Thavorn Phetudom

¹The Chula Soft Cadaver Surgical Training Center and Department of Anatomy, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, 1873 Rama 4 Road, Pathumwan, Bangkok 10330, Thailand. tanvaat@hotmail.com

European Journal of Obstetrics, Gynecology, and Reproductive Biology

|December 11, 2012

Summary

This study reveals the pelvic organ support system comprises a levator ani muscle complex and a neurovascular suspension system. Understanding these mechanisms is key for treating pelvic floor disorders.

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Anogenital Distance and Perineal Measurements of the Pelvic Organ Prolapse (POP) Quantification System

Anogenital Distance and Perineal Measurements of the Pelvic Organ Prolapse (POP) Quantification System

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Isolation and Characterization of the Murine Uterosacral Ligaments and Pelvic Floor Organs

Isolation and Characterization of the Murine Uterosacral Ligaments and Pelvic Floor Organs

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Related Experiment Videos

Last Updated: May 16, 2026

Quantification of Levator Ani Hiatus Enlargement by Magnetic Resonance Imaging in Males and Females with Pelvic Organ Prolapse

Quantification of Levator Ani Hiatus Enlargement by Magnetic Resonance Imaging in Males and Females with Pelvic Organ Prolapse

Published on: April 17, 2019

Anogenital Distance and Perineal Measurements of the Pelvic Organ Prolapse (POP) Quantification System

Anogenital Distance and Perineal Measurements of the Pelvic Organ Prolapse (POP) Quantification System

Published on: September 20, 2018

Isolation and Characterization of the Murine Uterosacral Ligaments and Pelvic Floor Organs

Isolation and Characterization of the Murine Uterosacral Ligaments and Pelvic Floor Organs

Published on: March 3, 2023

Area of Science:

Anatomy
Pelvic Floor Physiology
Surgical Anatomy

Background:

Pelvic organ support mechanisms are crucial for treating pelvic floor prolapse and stress urinary incontinence.
Effective interventions require a deep understanding of the physiological framework of pelvic support.

Purpose of the Study:

To investigate the anatomical basis of the pelvic organ support system.
To elucidate the underlying physiological mechanisms of pelvic organ support.

Main Methods:

Dissection of ten female soft embalmed cadavers.
Visualization of the components of the pelvic organ support system.

Main Results:

The levator ani muscle, arcus tendineus fasciae pelvis, and an adipose cushion pillow form a support system.
Endopelvic fascia and neurovascular structures provide a suspension system for pelvic organs.
Specific anatomical attachments and relationships of muscles and fascia were detailed.

Conclusions:

The pelvic organ support framework is composed of a muscular support system and a neurovascular suspension system.
These findings provide anatomical insights into pelvic organ support mechanisms.