Pubic symphysis is a secondary cartilaginous joint between the two pubic bones in the midline of body. It is located anterior to the urinary bladder and superior to the external genitalia.
Articulating surfaces of pubic symphysis:
The articulating surfaces are the medial surfaces of both pubic bones. Each of these surfaces is covered by a thin layer of hyaline cartilage. The surfaces of hyaline cartilages are connected with each other by fibrous cartilage. This joint is sometimes thought to be as flat, however, in reality, it is marked by a number of reciprocal crests and papillae.
Ligaments of pubic symphysis:
Anteriorly, the joint is strengthened by several fibrous layers, passing obliquely from bone to bone. These layers constitue the anterior pubic ligament. There is also a posterior pubic ligament cosisting of well-developed fibers. In addition to these two, the main ligaments of pubic symphysis are superior pubic ligaments and arcuate pubic ligament. The superior pubic ligament connects the bones above, while the arcuate pubic ligament connects the lower borders.
Blood supply of pubic symphysis:
The pubic symphysis is supplied by pubic branches of the obturator, superficial external pudendal and inferior epigastric arteries.
Nerve supply of pubic symphysis:
The pubic symphysis is innervated by branches from the iliohypogastric, ilioinguinal and pudendal nerves.
Movements at pubic symphysis:
The possible movements at this joint incule angulation, rotation and displacement. These movements are very slight because of the nature of joint.