Since these two cranial nerves intimately connected described here together. Glossopharyngeal nerve has a sensory component and speedboat. Motor fibres originate the nucleus ambiguus, located on the side of the spinal cord. Along with the vagus, and accessory nerves, leave the skull of the hole jugular. Muscle stylopharyngeus whose function is to provide the elevate the pharynx. Autonomic efferent fibers of the glossopharyngeal nerve arise from the inferior salivatory nucleus. Preganglionic fibers become otic ganglion of less superficial petrosal nerve. and postganglionic fibres pass through the auriculotemporal nerve fifth branch to reach the Parotid gland. The nuclei of the glossopharyngeal nerve sensory fibres are located in petrous found in petrous below of the hole bone jugular ganglion and also the upper ganglion, which is small. Exteroceptive fibres supplied faucial tonsils, the rear wall of the pharynx, part of the soft palate and sensations of taste of the rear third of the language.
The vague: this is the longest among all the cranial nerves. Motor fibres originate the ambiguous nucleu and supply of all the muscles in the throat, the soft palate and larynx, with the exception of tensor veli palati and stylopharyngeus. Parasympathetic fibers emerge from the dorsal efferent kernel and left cord as preganglionic fibers part craniosacral autonomous nervous system. These fibres end nodes close to the viscera supplying post-ganglionic fibers. Is parasympatahetic function. Therefore, vagal stimulation produces bronchial constriction, bradycardia, secretion of the gastric and pancreatic juice and greater peristalsis.Sensory part of the vague has their nuclei in the jugular in ganglion and ganglion vague nodoso.El sensations from the subsequent appearance of the external auditory meatus and adjacent pinna and the sensation of pain from the duramater lining the posterior cranial fossa.
Testing: It's better to test features of nerve IX and x together as they are affected usually together. Consult for symptoms such as dysphagia, dysarthria, nasal regurgitation of fluids and hoarseness of voice. Part of engine is tested by examining the uvula when the patient is made to open the mouth.The uvula is usually unilateral vague media.Paralisis online, palatal arc is flattened and dropped from ipsilaterally. The phonation the uvula is diverted to the normal side.
Gag reflex or pharyngeal reflex occurs through the application of a stimulus, such as a bucket of cotton to the wall of pharynx psoterior or squeezes region or language.If the mirror is present, there will be accompanied by retraction of the tongue pharyngeal muscles contraction and elevation.This reflex afferent arc is favoured by the glossopharyngeal, while the efferent is through the vago.Este reflection is lost in both nerve injury 9 or 10.Comprobar General sensation on the posterior wall of pharynx, soft palate, tonsils faucial and taste on the third back of the tongue. These are problems in glossopharyngeal paralysis.
Disorders of nerve functions of the ninth and tenth
Isolated from any nerve involvement is rare and usually involved together, often the nerves of the 11th and 12th centuries also may be affected. The glossopharyngeal neuralgia resembles the trigeminal neuralgia, but is much less common. It is presented as a paroxysmal pain originating from the throat of tonsillar fossa.It may be associated with bradycardia and in such cases is called neuralgia vegoglossopharyngeal.Una trial of phenytoin or carbamazepine is effective for pain relief.Brain stem as a disease of motor neuron, vascular lesions as lateral Medullary infarction or bulbar poliomyelitis injuries can affect these together resulting in bulbar paralysis nerves.Basal meningitis and posterior Fossa tumors can involve these nerves outside the brain stem.Complete bilateral paralysis of vague is incompatible with life.Especially on the left recurrent laryngeal nerve, participation occurs in thoracic injury and this produces only hoarseness of voice without dysphagia.
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