Where is the sacral artery located?
The median sacral artery is located roughly in the midline. It runs inferiorly over the anterior aspect of the lumbar vertebrae and sacrum towards the apex of the coccyx. On its course, it provides several small branches that supply the structures of the pelvis.
What structures are supplied by the sacral artery?
Supply. The median sacral artery contributes to the arterial supply of the 4th and 5th lumbar vertebrae, sacrum, coccyx and superoposterior rectum (minor contribution).
What does the lateral sacral artery supply?
Supply. The superior branch supplies the upper two sacral foramina and contents, erector spinae, and cutaneous supply over the sacrum. The inferior branch supplies the lower two sacral foramina and contents as well as the piriformis muscle, coccyx, erector spinae, and skin over the sacrum.
What is median sacral artery?
The median sacral artery (lat. arteria sacralis mediana) [MSA] is one of the terminal branches of the aorta that arises from its dorsal aspect just above aorta bifurcation [, , ]. During embryogenesis, the MSA originates from the primitive caudal aorta [3.
What is the sacral canal?
The sacral canal is a continuation of the spinal canal and runs throughout the greater part of the sacrum. Above the sacral hiatus, it is triangular in form. The canal lodges the sacral nerves, via the anterior and posterior sacral foramina.
What does the sacral plexus do?
The sacral plexus (plexus sacralis) is a nerve plexus that provides motor and sensory nerves for the posterior thigh, most of the lower leg, the entire foot, and part of the pelvis (see the following image). It is part of the larger lumbosacral plexus.
Where is the anterior sacral foramina?
The anterior (or pelvic) sacral foramina are openings in the concave anterior surface of the sacrum through which the anterior divisions of the sacral nerves and the lateral sacral arteries pass.
Where does median sacral artery?
The median sacral artery contributes to the arterial supply of the 4th and 5th lumbar vertebrae, sacrum, coccyx and superoposterior rectum (minor contribution).
Where is the median sacral crest?
The median sacral crest is located on the dorsal surface of the sacrum. The median sacral crest possesses three to four tubercles which are essentially the equivalent of the spinous processes of the upper sacral vertebrae.
What is the function of the sacrum?
The sacrum is a shield-shaped bony structure that is located at the base of the lumbar vertebrae and that is connected to the pelvis. The sacrum forms the posterior pelvic wall and strengthens and stabilizes the pelvis.
Why is sacrum fused?
The fusion of the vertebrae and the large size of the sacrum forms an ideal base that allows it to support the weight of the entire body.