the Nervus glossopharyngeus (of griech. glossa =Zunge, pharynx =Rachen) are the 9. Cranial nerve. It belongs to the so-called. Vagusgruppe and is evolutionary the 3. Kiemenbogennerv. The Nervus glossopharyngeus internal fourth tongue and throat. It possesses sensitive, sensory (taste), motor and parasympathische portions.
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the central areas of its parasympathischen (Nucleus parasympathicus nervi glossopharyngei) and motor (Nucleus motorius nervi glossopharyngei) nerve fibers lie in the Medulla oblongata. The nerve leaves the head cave by the throttle hole (Foramen jugulare), where it receives sensitive / sensory fibers from two ganglia. In usually still the ganglion lain within the head cave superius (with animals: ) The nerve cell bodies of the afferent fibers for contact , pain and temperature attractions, in the ganglion inferius (also ganglion petrosum, with animals, lain outside of the head cave, are appropriate for ganglion proximal: Ganglion distal) those of the taste fibers. Both correspond thereby to the Spinalganglion of a Spinalnerven.
Aufzweigungen of the Nervus glossopharyngeus
the Nervus tympanicus (“bass drum cave nerve”) goes off at the ganglion distal and pulls into the tympanic cavity, which he supplies sensitively. In the tympanic cavity it forms, together with sympathetic fibers from the ganglion cervicale superius the Plexus tympanicus. From this Plexus the Nervus rises petrosus minor, parasympathische fibers to the ganglion oticum leads (so-called. Jacobson anastomosis). There the fibers are switched to the second Neurone, which supply the Parotis (ear salivary gland) and the cheek glands and whose secretion energize.
the Ramus pharyngeus (“throat branch”) forms sympathetic fibers of the ganglion cervicale with throat branches of the Nervus vagus and superius the Plexus pharyngeus. This nerve network supplies the transversetouched musculature of the throat motor and the throat mucous membrane sensitively.
Rami of the linguales
Rami of linguales (“tongue branches”) lead contact, temperature, pain and taste feelings of the rear third of the tongue.
The Rami of tonsillares inside four the almonds and the mucous membrane of the throat.
The Ramus musculi stylopharyngei caudalis internal fourth the muscle of the same name, a Schlundkopferweiterer.
this also as throat cramp, Pharyngismus and/or. (English) glossopharyngeal spasm designated disturbance is caused by a cramp by the Nervus glossopharyngeus internal fourth muscles. It arises particularly when Tetanus, rabies and provoking by foreign bodies .
See also: Dysphagie
a damage of the Nervus glossopharyngeus leads to a paralysis throat head muscles and thus to sip disturbances (Dysphagie). They are frequently associated with damage of the Nervus vagus. Paralyses of the two cranial nerves e.g. step. when centralnervous illnesses such as Staupe and rabies up and a cause for it, that the patients (animal, is with rabies also humans) even not in addition able is to be drunk. Also Toxine of Clostridien (Tetanus, Botulismus) lead to disturbances of the nerve muscle coupling and thus among other things also to disturbances of the two cranial nerves and the sip act.
thereby e.g. concerns it a rare pain picture as form of a Neuralgie, those by partial attackenförmige pain within the range of the Hypopharynx, the tongue basis, the Tonsillen and the ear region with appropriate provoking. by washrooms, sips, speaking or pressure practice to come can. During participation of the Ramus sine carotici with it also a reflektorische bradycardia can occur or - to asystole. Causal usually a local Entmarkung of the nerve branches is by Pulsation of a neighbouring container. It can come to the transmission of electrical impulses of epikritischen nerve fibers (to lead information about pressure, contact, vibration and conscious depth sensitivity) on protopathische nerve fibers (information about pain and temperature leads).
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