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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.)

On this page:

Article:

Relations
Blood supply
Innervation
Related articles
References

Images:

Cases and figures

Relations

medial: motor root of the trigeminal nerve and sphenoid bone
lateral: posterior part of the cavernous sinus, petrous apex and petrous internal carotid artery
anterior: cavernous sinus and cavernous ICA
posterior: prepontine cistern
inferior: greater petrosal nerve and middle cranial fossa

Blood supply

small ganglionic branches of the cavernous portion of the ICA
accessory meningeal artery (from the maxillary artery, via the foramen ovale)

Innervation

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).

References

Anatomy: Head and neck

Article information

rID: 66939

System: Central Nervous System, Head & Neck

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 caveFigure 1: trigeminal ganglion in Meckel cave

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