Trigeminal ganglion

Dr Craig Hacking et al.

The trigeminal ganglion, also known as the Gasser, Gasserian or semilunar ganglion, is the large crescent-shaped sensoryganglion 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, the mandibular, descending into the foramen ovale.)

The ganglionic epineurium is innervated by the nervus spinosus (off the mandibular division of the trigeminal nerve and re-enters the skull via the foramen spinosum).

Anatomy: Head and neck
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Article information

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

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Cases and figures

  • Figure 1: trigeminal ganglion in Meckel cave
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