The sacral plexus lies in the back of the pelvis between the piriformis muscle and the pelvis fascia. In front of it are the internal iliac artery, internal iliac vein, the ureter, and the rectum.

What area of the body is affected by the sacral plexus?

Anatomical terms of neuroanatomy

In human anatomy, the sacral plexus is a nerve plexus which provides motor and sensory nerves for the posterior thigh, most of the lower leg and foot, and part of the pelvis. It is part of the lumbosacral plexus and emerges from the lumbar vertebrae and sacral vertebrae (L4-S4).

How many sacral plexus are there?

Every person has two sacral plexi, one on the right side and one on the left side; the two sides are symmetrical in structure and function.