Trigeminal ganglion

The trigeminal ganglion, also known as the Gasser, Gasserian or semilunar ganglion, is the large crescent-shaped sensory ganglion of the trigeminal nerve located in the trigeminal cave (Meckel cave) surrounded by cerebrospinal fluid.

The ganglion contains the cell bodies of the sensory root of the trigeminal nerve. From the ganglion, the 3 major divisions of the trigeminal nerve emerge anteriorly and inferiorly, with the first two (ophthalmic and maxillary divisions) passing anteriorly to enter the cavernous sinus, and the third (mandibular division) descending into the foramen ovale.

The ganglionic epineurium is innervated by the nervus spinosus from the mandibular division of the trigeminal nerve which re-enters the skull via the foramen spinosum.

Anatomy: Head and neck

Anatomy: Head and neck

Anatomy: Brain

Anatomy: Brain

Article information

rID: 66939
Section: Anatomy
Synonyms or Alternate Spellings:
  • Gasser ganglion
  • Gasserian ganglion
  • semilunar ganglion

Support Radiopaedia and see fewer ads

Cases and figures

  • Figure 1: trigeminal ganglion in Meckel cave
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.