Pelvic girdle


The pelvic girdle is created by two hip bones that come together and join at the symphysis pubis to create the girdle which provides support as well as protection for the lower visceral organs. The hip bones are usually referred to as the ossa coxae. The pelvic girdle is attached to the sacrum of the spinal column in the posterior region. The pelvis is constructed from the form given by the deep basin structure the ossa coxae form when they come together. The sacrum and the coccyx also give definition to this unique shape. The pelvic girdle shares the responsibility of supporting the body weight, particularly that which the spine produces. In a pregnant female body, the pelvic girdle also protects a developing fetus. The reproductive organs, the bladder, and other visceral organs are well within the framework that produces protection.


The pelvis is segregated into 2 basic structures, the greater and the lesser pelvis, alternatively the true and the false pelvis. The pelvic brim, a curved rim which passes inferior to the sacral promontory then along the upper margin that belongs to the symphisys pubis, is the dividing region between the 2 pelvic regions. The greater pelvis is that which is extended superior to the pelvic brim. The pelvic brim is not only responsible for the division of each individual pelvis but also encompasses the inlet of the lesser pelvis. The lower area of the lesser pelvis reveals the pelvic outlet.

The coxa is created from 3 various bones. The ilium, the ischium, and the pubis become fused in the grown adult body. Along the lateral surface after the 3 bones have undergone ossification, a wide ovular depression receives the head of the femur. This depression or indentation is known as the acetabulum. Despite the adult process of ossification of the hip bones, these bones are still considered 3 various bones.


Pelvic girdle
Image: Pelvic Girdle


The highest and largest of the 3 bones which comprise the pelvis is the ilium. It is designed with a crest, angles, and spines which are distinctively obvious for the attachment of various muscles. The prominence that is associated with the hip is created by the iliac crest. As the crest reaches the anterior portion, it alters into the anterior superior iliac spine. Just below this rests the anterior and inferior iliac spine. As the posterior portion of the iliac crest terminates it forms the posterior superior iliac spine. Just below this the greater sciatic notch provides passage for the sciatic nerve. The rough auricular surface located on the medial portion of the illium conjoins with the sacrum. Adversely, the smooth concave portion of the anterior surface belongs to the iliac fossa. From this fossa conjoins the iliacus muscle. Posterior to the iliac fossa the iliac tuberosity provides the point of attachment for the sacroliliac ligament. The gluteal surface is represented by 3 roughened ridges on the posterior portion of the iliac. Presented anterior, inferior, and posterior these roughened ridges attach gluteus muscles.


The posterior and inferior portion of the ossa coxae is known as the ischium. The distinguishing spine of the ischium is an obvious projection immediately posterior and inferior to the illium’s great sciatic notch. The lesser sciatic notch belonging to the ischium is then just inferior to this spine.

The body’s weight is supprted in the seated posture by the ischial tuberosity. Located on the inferior section of the acetebulum is the seething acetubular notch. The inferior ramux of this unique bone forms the large obturator foramen. This as well comes together at the conjoining of the pubis. This foramen is additionally saturated with obturator membrane to allow the attachment of several surrounding muscles.


The anterior bone of the trio which comprises the 3 ossa coxae is the pubis. The supportive structure of the pubis is created by superior and inferior ramus. The joint structure located between the 2 ossa coxae, the symphisys pubis, is created by this entire structure. The inguinal ligament is then attached to the pubic tubercle which is created at the later end of the anterior border.
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