Trigeminal ganglion

trigeminal gangliaGasserian ganglionSemilunar ganglionGasser's ganglionGasserianGasserian ganglionectomyTGtrigeminaltrigeminal nerve ganglia
The trigeminal ganglion (or Gasserian ganglion, or semilunar ganglion, or Gasser's ganglion) is a sensory ganglion of the trigeminal nerve (CN V) that occupies a cavity (Meckel's cave) in the dura mater, covering the trigeminal impression near the apex of the petrous part of the temporal bone.wikipedia
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Trigeminal nerve

trigeminalCN VV
The trigeminal ganglion (or Gasserian ganglion, or semilunar ganglion, or Gasser's ganglion) is a sensory ganglion of the trigeminal nerve (CN V) that occupies a cavity (Meckel's cave) in the dura mater, covering the trigeminal impression near the apex of the petrous part of the temporal bone.
The three major branches of the trigeminal nerve—the ophthalmic nerve (V 1 ), the maxillary nerve (V 2 ) and the mandibular nerve (V 3 )—converge on the trigeminal ganglion (also called the semilunar ganglion or gasserian ganglion), located within Meckel's cave and containing the cell bodies of incoming sensory-nerve fibers.

Mandibular nerve

mandibular divisionmandibular division of the trigeminal nervemandibular
The motor root runs in front of and medial to the sensory root, and passes beneath the ganglion; it leaves the skull through the foramen ovale, and, immediately below this foramen, joins the mandibular nerve. From its convex border, which is directed forward and lateralward, three large nerves proceed, viz., the ophthalmic (V 1 ), maxillary (V 2 ), and mandibular (V 3 ).
The large sensory root emerges from the lateral part of the trigeminal ganglion and exits the cranial cavity through the foramen ovale.

Petrous part of the temporal bone

petrous bonepetrous portionpetrous portion of the temporal bone
The trigeminal ganglion (or Gasserian ganglion, or semilunar ganglion, or Gasser's ganglion) is a sensory ganglion of the trigeminal nerve (CN V) that occupies a cavity (Meckel's cave) in the dura mater, covering the trigeminal impression near the apex of the petrous part of the temporal bone.

Trigeminal cave

Meckel's cave
The trigeminal ganglion (or Gasserian ganglion, or semilunar ganglion, or Gasser's ganglion) is a sensory ganglion of the trigeminal nerve (CN V) that occupies a cavity (Meckel's cave) in the dura mater, covering the trigeminal impression near the apex of the petrous part of the temporal bone.
It envelops the trigeminal ganglion.

Internal carotid artery

internal carotid arteriesinternal carotidinternal
It is somewhat crescent-shaped, with its convexity directed forward: Medially, it is in relation with the internal carotid artery and the posterior part of the cavernous sinus.
Farther forward it is separated from the trigeminal ganglion by a thin plate of bone, which forms the floor of the fossa for the ganglion and the roof of the horizontal portion of the canal.

Maxillary nerve

maxillarymaxillary divisionpalatine nerve
From its convex border, which is directed forward and lateralward, three large nerves proceed, viz., the ophthalmic (V 1 ), maxillary (V 2 ), and mandibular (V 3 ).
It begins at the middle of the trigeminal ganglion as a flattened plexiform band then it passes through the lateral wall of the cavernous sinus .It leaves the skull through the foramen rotundum, where it becomes more cylindrical in form, and firmer in texture.

Internal carotid plexus

carotid plexus
The ganglion receives, on its medial side, filaments from the carotid plexus of the sympathetic.
The internal carotid plexus communicates with the trigeminal ganglion, the abducent nerve, and the pterygopalatine ganglion (also named sphenopalatine); it distributes filaments to the wall of the internal carotid artery, and also communicates with the tympanic branch of the glossopharyngeal nerve.

Trigeminal neuralgia

Tic Douloureuxneuropathic facial paintrifacial neuralgia
The thermocoagulation or injection of glycerol into the trigeminal ganglion has been used in the treatment of trigeminal neuralgia.
It is, "therefore widely accepted that trigeminal neuralgia is associated with demyelination of axons in the Gasserian ganglion, the dorsal root, or both."

Ophthalmic nerve

ophthalmicophthalmic divisionophthalmic branch
From its convex border, which is directed forward and lateralward, three large nerves proceed, viz., the ophthalmic (V 1 ), maxillary (V 2 ), and mandibular (V 3 ).
It is the smallest of the three divisions of the trigeminal, and arises from the upper part of the trigeminal ganglion as a short, flattened band, about 2.5 cm.

Ganglion

gangliaganglion cellspreganglionic neurons
The trigeminal ganglion (or Gasserian ganglion, or semilunar ganglion, or Gasser's ganglion) is a sensory ganglion of the trigeminal nerve (CN V) that occupies a cavity (Meckel's cave) in the dura mater, covering the trigeminal impression near the apex of the petrous part of the temporal bone. The motor root runs in front of and medial to the sensory root, and passes beneath the ganglion; it leaves the skull through the foramen ovale, and, immediately below this foramen, joins the mandibular nerve.

Dura mater

duraduralcovering of the spinal cord
The trigeminal ganglion (or Gasserian ganglion, or semilunar ganglion, or Gasser's ganglion) is a sensory ganglion of the trigeminal nerve (CN V) that occupies a cavity (Meckel's cave) in the dura mater, covering the trigeminal impression near the apex of the petrous part of the temporal bone.

Cavernous sinus

cavernous sinusescavernouscavernous sinus syndrome
It is somewhat crescent-shaped, with its convexity directed forward: Medially, it is in relation with the internal carotid artery and the posterior part of the cavernous sinus.

Ventral root of spinal nerve

ventral rootsventral rootanterior nerve roots
The motor root runs in front of and medial to the sensory root, and passes beneath the ganglion; it leaves the skull through the foramen ovale, and, immediately below this foramen, joins the mandibular nerve.

Dorsal root of spinal nerve

dorsal rootdorsal rootsposterior root
The motor root runs in front of and medial to the sensory root, and passes beneath the ganglion; it leaves the skull through the foramen ovale, and, immediately below this foramen, joins the mandibular nerve.

Foramen ovale (skull)

foramen ovaleforamen
The motor root runs in front of and medial to the sensory root, and passes beneath the ganglion; it leaves the skull through the foramen ovale, and, immediately below this foramen, joins the mandibular nerve.

Greater petrosal nerve

greater superficial petrosal nervegreater superficial petrosalgreater petrosal
The greater superficial petrosal nerve lies also underneath the ganglion.

Cerebellar tentorium

tentorium cerebellitentoriuminfratentorial neoplasms
It gives off minute branches to the tentorium cerebelli, and to the dura mater in the middle fossa of the cranium.

Herpes simplex

herpesherpes virusesHerpetic sycosis
After recovery from a primary herpes infection, the virus is not cleared from the body, but rather lies dormant in a non-replicating state within the trigeminal ganglion.

Virus

virusesviralvirion
After recovery from a primary herpes infection, the virus is not cleared from the body, but rather lies dormant in a non-replicating state within the trigeminal ganglion.

Virus latency

latentlatencylatent infection
After recovery from a primary herpes infection, the virus is not cleared from the body, but rather lies dormant in a non-replicating state within the trigeminal ganglion.

Trigeminal trophic syndrome

Trigeminal trophic lesiontrigeminal trophic lesions
The trigeminal ganglion is damaged, by infection or surgery, in Trigeminal trophic syndrome.

Glycerol

glyceringlycerineE422
The thermocoagulation or injection of glycerol into the trigeminal ganglion has been used in the treatment of trigeminal neuralgia.

Whiskers

vibrissaewhiskervibrissa
In rodents, the trigeminal ganglion is important as it is the first part of the pathway from the whiskers to the brain.

Afferent nerve fiber

afferentafferent fibersafferent nerve
Cell bodies of the whisker primary afferents are found here.

Brainstem

brain stembrain-stemback of the skull
It is found at the base of the skull and projects to trigeminal brain stem areas including principalis, spinal trigeminal nucleus, interpolaris, and caudalis.