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Anatomy and Function of the Pelvis

Learn about the anatomy and function of the pelvis with the help of this article. The bony pelvis serves a variety of functions. The bones and ligaments are an important part of the human body, allowing the body to bear weight, and provide support to the torso and legs. It is also a stable anchor for some muscles and other structures. Below are some of the most important functions of the pelvis. Learn about the different varieties of the pelvis.

Variations of the pelvis

The female pelvis are larger than those of males. This difference in size is reflected in the different shapes of the sacrum and anterior superior iliac spine. The sacral promontory is narrower and projects less anteriorly in females, while the pelvic outlet is wider and shallower in women than in men. These differences in the shape of the pelvis affect the position and function of the pelvic organs, especially during childbirth.

Anatomy

The vascular supply of the pelvis supports pelvic organs and structures, and it extends to the lower extremities. There are several sections of the pelvic artery and vein, as well as its common variants and collateral pathways. The aorta and veins supply the iliac crest and the abdominal aorta, while the internal iliac artery supplies the pelvic organs and gluteal muscles.

Development

The pelvic region is prone to side collisions in road accidents, so studying the pelvic structure can be helpful in the design of occupant protection devices. Recently, a study developed a highly biofidelic pelvic model in Chinese adults and assessed sensitivity to differences in bone thickness and material properties. The results of the study were used to design novel occupant protection devices and vehicles. However, some questions remain. This paper addresses some of those questions.

Function

The pelvis is the central component of movement in the legs and spine. Its two halves, called acetabulofemoral joints, are each capable of independent movement. These movements are essential for walking and running. The femur, at its hip joint, can rotate and dorso-ventral abduction. In addition, the pelvis can flex and rotate in various directions, called pronation.

Bony pelvis

The bony pelvis is made up of three separate parts: the sacrum, the innominate bones, and the coccyx. The three bones are joined by the sacroiliac joint, the triradiate cartilage, and the pubic symphysis. The coccyx is the most common bone that is associated with the hip joint, where it articulates with the proximal femur. Together, these bones form the acetabulum. The acetabulum, or hip socket, allows for the transfer of upper body weight to the lower limbs. A multi-surfaced pelvic ring acts as the attachment points of lower limbs.

Iliac crest

Pain near the iliac crest can be caused by a variety of different factors, including joint or pelvic trauma. It can also result from repetitive movements or stretching required to carry a growing fetus. As with other pelvic injuries, it is important to visit a doctor to determine the best treatment method for your specific pain. The pain at the iliac crest can also radiate to other parts of the body.

Pubic crest

The pubic crest separates the anterior and posterior surfaces of the pelvis. Its lateral end, called the pubic tubercle, is located about 2.5 cm from the pubic symphysis. It serves as a point of attachment for the inguinal ligament, which can be used to identify the inguinal canal rings. The pubic arch is the curved area below the pubic symphysis, which is one of the most sexually dimorphic areas of the pelvis.

Inguinal ligament

The inguinal ligament is a constricted band of dense fibrous connective tissue found in the pelvis. It originates in the anterior superior iliac spine and runs toward the pubic tubercle, which is located in the bottom center of the pelvis. The ligament forms the floor of the inguinal canal, which connects the abdominal cavity with the groin. In addition to its role as the floor of the pelvic canal, the inguinal ligament is also important for maintaining hip flexibility.