sacral ganglion

sacral sympathetic ganglion

A ganglion that is part of the sacral portion of the sympathetic trunk. A sacral ganglion consists of postganglionic sympathetic neurons that receive presynaptic input from preganglionic sympathetic axons descending through the sympathetic trunk from thoracolumbar levels.

Type Nerve
Parent Structure paravertebral ganglion
Latin Name sacral sympathetic ganglion
FMA ID 6473

Frequently Asked Questions

What is a sacral ganglion?
A sacral ganglion is a ganglion forming part of the sacral portion of the sympathetic trunk. It contains postganglionic sympathetic neurons that receive presynaptic input from preganglionic sympathetic axons descending through the sympathetic trunk from thoracolumbar spinal levels.
Where is the sacral ganglion located?
Sacral ganglia are located along the anterior surface of the sacrum, forming the terminal portion of the paired sympathetic chains that run on either side of the vertebral column. They are connected to one another and to the lumbar ganglia above, and the two chains converge at the ganglion impar in front of the coccyx.
What is the function of the sacral ganglion?
Sacral ganglia relay sympathetic signals to pelvic organs, blood vessels, and structures of the lower limbs. They are involved in regulating blood flow to pelvic structures, the fight-or-flight responses of pelvic viscera, and some aspects of genitourinary and gastrointestinal function in the pelvis.
What conditions may affect the sacral ganglion?
Sacral ganglia may be associated with pelvic pain syndromes, complex regional pain syndrome affecting the lower limbs, and nerve entrapment or injury related to sacral fractures or pelvic surgery. Herpes zoster infection can affect the sacral nerve roots and associated ganglionic tissue.
How is the sacral ganglion examined?
Sacral ganglia may be visualized on MRI of the pelvis and sacrum in the context of nerve or tumor evaluation. Histological examination of excised tissue allows assessment of ganglionic cell populations and inflammatory or neoplastic changes. Nerve conduction studies and electromyography evaluate the functional integrity of associated sacral nerve pathways.

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Educational Disclaimer

This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical decisions.

Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.