Coccygeal plexus
Encyclopedia
The coccygeal plexus is a plexus
of nerves near the coccyx
bone.
. It gives rise to the anococcygeal nerve
.
Plexus
A plexus is a part of nervous system. Plexus has a slightly different definition in vertebrates and in invertebrates.- In vertebrates :In vertebrates, a plexus is an area where nerves branch and rejoin. The electrical signals do not mix; rather, the fibres travel together with their electrical...
of nerves near the coccyx
Coccyx
The coccyx , commonly referred to as the tailbone, is the final segment of the vertebral column. 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...
bone.
Structure
This plexus is formed by the fifth sacral nerve (with a contribution from S4) and the coccygeal nerveCoccygeal nerve
-Structure:The coccygeal nerve is the 31st spinal nerve. It arises from the sacral plexus, and its ventral ramus helps form the coccygeal plexus. It does not divide into a medial and lateral branch...
. 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.-Structure:The anococcygeal nerve arises from a small plexus known as the coccygeal plexus...
.
See also
- Coccydynia (coccyx pain, tailbone pain)CoccydyniaCoccydynia is a medical term meaning pain in the coccyx or tailbone area, usually brought on by sitting too abruptly.-Diagnosis:A number of different conditions can cause pain in the general area of the coccyx, but not all involve the coccyx and the muscles attached to it. The first task of...
- Ganglion imparGanglion imparThe 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...
- Sacral plexusSacral plexus-External links:*...
External links
- Description at uams.edu
- Coccyx pain (tailbone pain, coccydynia) (Peer-reviewed medical chapter, available free online at eMedicine)