A plexus is a network. It has more specific meanings in multiple fields.... of nerves near the coccyx
Coccyx
The coccyx , commonly referred to as the tailbone, is the final segment of the human spine . Comprising three to five separate or fused vertebrae below the sacrum, it is attached to the sacrum by a fibrocartilaginous joint, the sacrococcygeal symphysis, which permits limited movement between the sacrum and the coccyx.... bone.
A plexus is a network. It has more specific meanings in multiple fields.... of nerves near the coccyx
Coccyx
The coccyx , commonly referred to as the tailbone, is the final segment of the human spine . Comprising three to five separate or fused vertebrae below the sacrum, it is attached to the sacrum by a fibrocartilaginous joint, the sacrococcygeal symphysis, which permits limited movement between the sacrum and the coccyx.... bone.
Structure
This plexus is formed by the fifth sacral nerve (with a contribution from S4) and the coccygeal nerve
Coccygeal nerve
The coccygeal nerve is the spinal nerve that corresponds to the coccyx bone.... . It gives rise to the anococcygeal nerve
Anococcygeal nerve
The anococcygeal nerve is a nerve in the pelvis which provides sensory innervation to the skin over the coccyx.... .
The pelvic portion of each sympathetic trunk is situated in front of the sacrum, medial to the anterior sacral foramina. It consists of four or five small sacral ganglia, connected together by interganglionic cords, and continuous above with the abdominal portion....
In human anatomy, the sacral plexus is a nerve plexus which, as part of the lumbosacral plexus, emerges from the sacral vertebrae , and which provides motor and sensory nerves for the posterior thigh, most of the lower leg, the entire foot, and part of the pelvis....
External links
(Peer-reviewed medical chapter, available free online at eMedicine)
