Eighth cranial nerve. Medical search. Frequent questions

What happens if the Vestibulocochlear nerve is damaged? (greatgreenwedding.com)
The vestibulocochlear nerve sends balance and head position information from the inner ear (see left box) to the brain. (greatgreenwedding.com)
These nerves are twined together to form the vestibulocochlear nerve (eighth cranial nerve). (mayoclinic.org)
Anatomical features of the auditory pathway of interest to microwave hearing begin with the cochlea within which hair cells transduce sound into neural impulses that are transmitted through the vestibulocochlear nerve. (slavery.org.uk)
The cochlear nerve arises from the vestibulocochlear nerve for transmission to the cochlear nuclear complex at the brainstem pontomedullary junction. (slavery.org.uk)
The eighth cranial nerve, which traverses from the inner ear to the brain, is also called the auditory nerve or vestibulocochlear nerve . (medifocus.com)
Tumors first distort the vestibulocochlear nerve from which they develop, and then may eventually press on the facial nerve, which may become stretched as it makes room for the tumor. (medifocus.com)
The membranous labyrinth spirals around a central bony canal, the modiolus, that contains the auditory division of the vestibulocochlear nerve (i.e., 8th cranial) and blood vessels to the cochlea. (cdc.gov)

Typewriter tinnitus, a symptom characterized by paroxysmal attacks of staccato sounds, has been thought to be caused by neurovascular compression of the cochlear nerve, but the correlation between radiologic evidence of neurovascular compression of the cochlear nerve and symptom presentation has not been thoroughly investigated. (ajnr.org)
The purpose of this study was to examine whether radiologic evidence of neurovascular compression of the cochlear nerve is pathognomonic in typewriter tinnitus. (ajnr.org)
Groups 1 (16 symptomatic sides), 2 (14 asymptomatic sides), and 3 (16 control sides) were compared with regard to the anatomic relation between the vascular loop and the internal auditory canal and the presence of neurovascular compression of the cochlear nerve with/without angulation/indentation. (ajnr.org)
05). Meanwhile, neurovascular compression of the cochlear nerve on MR imaging was significantly higher in group 1 than in group 3 ( P = .032). (ajnr.org)
However, considerable false-positive (no symptoms with neurovascular compression of the cochlear nerve on MR imaging) and false-negative (typewriter tinnitus without demonstrable neurovascular compression of the cochlear nerve) findings were also observed. (ajnr.org)
Neurovascular compression of the cochlear nerve was more frequently detected on the symptomatic side of patients with typewriter tinnitus compared with the asymptomatic side of these patients or on both sides of control subjects on MR imaging. (ajnr.org)
However, considering false-positive and false-negative findings, meticulous history-taking and the response to the initial carbamazepine trial should be regarded as more reliable diagnostic clues than radiologic evidence of neurovascular compression of the cochlear nerve. (ajnr.org)
6 ⇓ - 8 Typewriter tinnitus is considered the result of dysmyelination and demyelination of the contact point between the arterial loop and the cochlear nerve that transmits an abnormal signal to the auditory cortex. (ajnr.org)
It consists of three nerves that link the eardrum to the brain, including the cochlear nerve (carries hearing information) and left and right nerves (carry balance signals from the inner ear to the brain). (facialparalysisinstitute.com)
Dr Wang said he was somewhat surprised by the study results, although he and his colleagues had already reported that patients with migraine have a higher chance of developing sudden sensorineural hearing loss related to the eighth cranial nerve, or the cochlear nerve. (medscape.com)
The auditory nerve (eighth cranial nerve) is made up of two segments: the vestibular nerve segment and the cochlear nerve segment. (medifocus.com)
The cochlear nerve transmits information about sound. (medifocus.com)
These two nerve components lie next to each other and next to the cochlear nerve as they pass through the internal auditory canal , a small bony canal that leads from the inner ear to the brainstem. (medifocus.com)

Benign tumors can occur in nerves, muscle and bone. (mayoclinic.org)
An acoustic neuroma (vestibular schwannoma) is a benign tumor that develops on the balance and hearing nerves leading from the inner ear to the brain. (mayoclinic.org)
Benign tumor that grows on the eighth cranial nerve. (uclahealth.org)
While skull base tumors are often benign, they can cause life-threatening problems because of their location near nerves and blood vessels. (uclahealth.org)
Benign tumor that grows on the spinal and peripheral nerves. (uclahealth.org)
Tumor, usually benign, which may develop on the hearing and balance nerves and can cause gradual hearing loss, tinnitus , and/or dizziness. (wikipedia.org)
It causes schwannomas (benign nerve tumors) to grow throughout the body. (uhhospitals.org)
NF2 is caused by a malfunctioning tumor suppressor gene on chromosome 22, leading to the growth of benign (noncancerous) tumors on the nerves that control balance in the inner ear. (facialparalysisinstitute.com)
If a benign tumor is big enough, its size and weight can press on nearby blood vessels, nerves, or organs, or otherwise cause problems. (indiasurgerytour.com)
Benign tumor occurring in the 8th cranial nerve (the acoustic nerve) between the pons and the cerebellum. (indiasurgerytour.com)
An acoustic neuroma , also called a vestibular schwannoma , is a benign tumor that is located on the eighth cranial nerve. (medifocus.com)
Vestibular schwannomas (VSs) are benign, slow-growing tumors of the eighth cranial nerve. (bvsalud.org)

The main cause of trigeminal neuralgia is blood vessels pressing on the root of the trigeminal nerve. (greatgreenwedding.com)
The symptoms of a peripheral nerve tumor develop from direct effects on the main nerve or from the tumor pressing on nearby nerves, blood vessels or tissues. (mayoclinic.org)

For the 3rd (ocolomotor), 4th (trochlear), and 6th (abducens) cranial nerves, eyes are observed for symmetry of movement, globe position, asymmetry or droop of the eyelids (ptosis), and twitches or flutters of globes or lids. (msdmanuals.com)
A somatic motor nerve originating in the abducens nucleus in the pons. (unboundmedicine.com)

Can auditory nerve damage be repaired? (greatgreenwedding.com)
Once damaged, your auditory nerve and cilia cannot be repaired. (greatgreenwedding.com)
The vestibular portion of the auditory nerve is the site of origin in up to 95% of the cases of acoustic neuromas. (medifocus.com)

It is one of the most common neurologic disorders of the cranial nerves (see the image below). (medscape.com)
Bell palsy is one of the most common neurologic disorders affecting the cranial nerves, and it is the most common cause of facial paralysis worldwide. (medscape.com)

Peripheral nerves have potential for self-repair, but it is a slow process that may take 3-4 months or longer. (greatgreenwedding.com)
Peripheral nerves control muscles that allow you to walk, blink, swallow, pick things up and do other activities. (mayoclinic.org)
Introduction to the Neurologic Examination The purpose of the neurologic examination is to establish whether the patient's brain, special senses, spinal cord, peripheral nerves, and muscle and skin receptors are functioning normally. (msdmanuals.com)
With the NF-1 type of Neurofibromatosis, tumors can grow on the peripheral nerves and under the skin. (ihealthdirectory.com)

Pressure on this nerve may also be caused by a tumor or multiple sclerosis (MS). (greatgreenwedding.com)
A more complex nerve sheath tumor may assume the shape of a dumbbell. (mayoclinic.org)
This type of tumor occurs in the spine and lower abdomen and are intertwined with important nerves. (mayoclinic.org)
The pressure on the nerve from the tumor may cause hearing loss and imbalance. (mayoclinic.org)
When the tumor can't be removed without damaging nearby healthy tissue and nerves, other treatments may be considered. (mayoclinic.org)
The goal of surgery is the complete removal of the tumor without harming the seventh cranial nerve (which controls facial movement) or causing hearing loss. (braintumor.org)
In acoustic neurinoma surgery, the surgeon is required to find a cleavage plane between the facial nerve and the tumor, and with the aid of the operating microscope this is usually achieved by fine dissection. (thejns.org)
A histological specimen of the nerve-tumor interface is available only if the facial nerve was hopelessly adherent to the tumor (usually a large or giant neoplasm) and the surgeon decided to sever the nerve to obtain a complete removal. (thejns.org)
The authors have examined immunohistochemically the nerve-tumor interface of 20 such facial nerves (six cases of neurofibromatosis 2 (NF2) and 14 of non-NF2) in a series of 351 acoustic neurinomas. (thejns.org)
In all of these 20 instances the nerve-tumor contact area was at least partially devoid of a clear-cut histological cleavage plane. (thejns.org)
Where the facial nerve trunk was attached to the surface of the tumor, nerve fibers of the contact areas either abutted directly against tumor cells or nerve fibers were seen to penetrate into the tumor tissue. (thejns.org)
Surgical findings showed schwannomas of the glossopharyngeal nerve in seven patients and tumor involvement of both the glossopharyngeal and vagal nerves in one patient. (ajnr.org)
Schwannomas of the jugular foramen, usually with origin from the ninth nerve, are rare, but the presenting symptoms may be similar to those of a vestibular schwannoma owing to mass effect by tumor growth in the posterior cranial fossa (2-4) . (ajnr.org)
The growths are called neurofibroma which is another name for a tumor growing on the nerves. (ihealthdirectory.com)
The main complication with NF-2 is visibular schwannoma, or a tumor that grows on the eighth cranial nerve. (ihealthdirectory.com)
The tumor can grow on either the right or left side of the nerve. (ihealthdirectory.com)
A tumor on this nerve will eventually cause the child to be deaf. (ihealthdirectory.com)
Removing the tumor can cause damage to the surrounding nerves and is very difficult to remove without affecting them. (ihealthdirectory.com)

They also lie next to the facial nerve (seventh cranial nerve). (medifocus.com)

How do I calm my trigeminal nerve? (greatgreenwedding.com)
Trigeminal nerve injuries not only causes significant neurosensory deficits and facial pain, but can cause significant comorbidities due to changes in eating habits from muscular denervation of masticator muscles or altered sensation of the oral mucosa. (greatgreenwedding.com)
As they grow, tumors take on a pear-like shape and may begin to press on the trigeminal nerve, which is responsible for facial sensation. (medifocus.com)
Trigeminal neuralgia is a common cause of chronic orofacial pain due to inflammation or other pathology of the trigeminal nerve. (biomedcentral.com)
The trigeminal nerve, which divides into three branches, the ophthalmic (V1), maxillary (V2), and mandibular (V3) branches, is responsible for the sensory supply of the orofacial region. (biomedcentral.com)
Previous animal studies have demonstrated that the trigeminal nerve input interacts with the neural activity of the central auditory pathways related to sound perception at the level of dorsal cochlear nucleus [ 13 , 26 ]. (biomedcentral.com)
This may explain the mechanism of tinnitus experienced by some patients with trigeminal nerve pathology. (biomedcentral.com)

Tumors of the cranial nerve sheath constitute 5% to 10% of all intracranial neoplasms, yet few articles have described their CT and MR characteristics. (ajnr.org)
Cranial nerve sheath tumors constitute 5% to 10% of all intracranial neoplasms. (ajnr.org)
These are tumours that are made up of cells known as oligodendrocytes, which produce the fatty covering of nerve cells: the myelin sheath. (indiasurgerytour.com)

The patches record eye movements that occur when the inner ear and nearby nerves are stimulated by the water or air. (medlineplus.gov)
Abnormal results may be a sign of damage to the nerve of the inner ear or other parts of the brain that control eye movements. (medlineplus.gov)
This nerve carries balance and sound signals from the inner ear to the brain. (uclahealth.org)
Eighth cranial nerve that connects the inner ear to the brainstem and is responsible for hearing and balance. (wikipedia.org)
It is noncancerous and grows on a tiny nerve that is located near facial nerves between the inner ear and brainstem. (facialparalysisinstitute.com)
The vestibular nerve transmits information about equilibrium (balance) from the inner ear to the brain. (medifocus.com)
As the stapes vibrates, it transmits the sound vibrations to the cochlea, the snail shaped portion of the inner ear, which transforms the vibrations into nerve signals that are transmitted to the brain where they are interpreted as sound. (petplace.com)
The components of the eighth cranial nerve (CN VIII) carrying axons that convey information regarding sound and balance between the spiral ganglion in the inner ear and the cochlear nuclei in the brainstem. (unboundmedicine.com)
The inner ear is innervated by the eighth cranial nerve in all vertebrates. (medscape.com)

Renal and eighth cranial nerve function should be closely monitored, especially in patients with known or suspected reduced renal function at onset of therapy and also in those whose renal function is initially normal but who develop signs of renal dysfunction during therapy. (nih.gov)
Applicants with reactive serologic tests consistent with syphilis should be asked specifically about and evaluated for clinical symptoms or signs suggestive of neurosyphilis (e.g., cranial nerve dysfunction, meningitis, stroke, acute or chronic altered mental status, loss of vibration sense, and auditory or ophthalmic abnormalities). (cdc.gov)

Bell palsy is an acute, unilateral, peripheral, lower-motor-neuron facial nerve paralysis that gradually resolves over time in 80-90% of cases. (medscape.com)
A very large vestibular schwannoma may cause ninth cranial nerve palsy. (ajnr.org)
Their observational cohort study of patients with migraine and matched controls found that the association between migraine and Bell's palsy, an acute, ipsilateral facial nerve paralysis that results in weakness of the platysma and muscles of facial expression, was not affected by sex or migraine subtype. (medscape.com)
We hypothesize that more frequent or severe migraine attacks might predispose facial nerves to subsequent Bell's palsy. (medscape.com)
Several mechanisms may explain the link between migraine and Bell's palsy, but the "top hypothesis," according to Dr Wang, is that neurogenic inflammation of nearby cranial nerves may predispose the facial nerve to demyelination, perhaps after a viral infection. (medscape.com)

The posterior superior alveolar nerves (also from CN V2) innervate the rest of the upper molars. (unboundmedicine.com)
The posterior auricular nerve is a motor branch of the facial nerve (CN VII) that innervates the posterior and intrinsic auricular muscles. (unboundmedicine.com)
Genetic evaluation and application of posterior cranial fossa traits as endophenotypes for Chiari type I malformation. (dukecancerinstitute.org)

An acoustic neuroma occurs on the eighth cranial nerve. (facialparalysisinstitute.com)
A conservative approach is prudent if the surgeon who performs an acoustic neuroma feels that the nerve was saved during the operation. (facialparalysisinstitute.com)

Smell, a function of the 1st (olfactory) cranial nerve, is usually evaluated only after head trauma or when lesions of the anterior fossa (eg, meningioma) are suspected or patients report abnormal smell or taste. (msdmanuals.com)

Intraneural tumors grow within nerves. (mayoclinic.org)
It is the disorder where tumors grow on the brain and spinal nerves. (ihealthdirectory.com)

Increasing evidence implicates herpes simplex type I and herpes zoster virus reactivation from cranial-nerve ganglia. (medscape.com)
The neuronal cell bodies of a nerve's axons are in the brain, the spinal cord, or ganglia, but the nerves run only in the peripheral nervous system. (unboundmedicine.com)

Abnormalities in their function suggest pathology in specific parts of the brain stem or along the cranial nerve's path outside the brain stem. (msdmanuals.com)
Specific combinations of cranial nerve signs may suggest pathology at specific locations around the base of the skull. (msdmanuals.com)

Peripheral nerve tumors are growths that form in or near nerves. (mayoclinic.org)

In these disorders, tumors develop on or near the nerves throughout the body. (mayoclinic.org)
thus, they can be considered cranial nerve disorders, neuro-ophthalmologic. (msdmanuals.com)
However, it disorders such as hypercalcaemia, urae- does not confirm that a long survival time mia and hyperviscosity or due to periph- might increase the prevalence, and a large eral neuro pathy, spinal cord compression series over several years might be needed to and cranial nerve infiltration [ 5 ]. (who.int)

The glossopharyngeal nerve receives input from the general and special sensory fibers in the back of the throat. (greatgreenwedding.com)
The auricular branch of the vagus nerve is a sensory nerve emerging from the superior ganglion of the vagus nerve, joined by branches from the glossopharyngeal (CN IX) and facial nerves, and innervating the lower part of the tympanic membrane and the floor of the external auditory canal. (unboundmedicine.com)
A sensory branch of the mandibular nerve (CN V3) It passes through the parotid gland en route to the ear, where it innervates skin of the pinna, external auditory canal, and tympanic membrane. (unboundmedicine.com)

The assessment of nerve injury includes a careful neurological examination, sometimes accompanied by tests, e.g., electromyography or nerve conduction studies. (unboundmedicine.com)

How do you test for vagus nerve damage? (greatgreenwedding.com)
To test the vagus nerve, a doctor may check the gag reflex. (greatgreenwedding.com)
If the person doesn't gag, this may be due to a problem with the vagus nerve. (greatgreenwedding.com)
CRANIAL NERVE 9 (GLOSSOPHARYNGEAL) AND CRANIAL NERVE 10 (VAGUS) CNs 9 and 10 work together to supply the musculature of the pharynx (mostly supplied by CN 10) and transmit visceral afferent information from vascular baroreceptors, and each nerve also has additional individual functions listed below. (greatgreenwedding.com)

Symptoms of peripheral nerve tumors vary depending on where the tumors are located and the tissues affected. (mayoclinic.org)
Symptoms of nerve injury include paresthesias, loss of sensation and position sense, impaired motor function, cranial nerve malfunction, changes in reflexes, and impairments in glandular secretion. (unboundmedicine.com)

However, the presence of an abnormal cranial nerve sign strongly suggests that the observed weakness results from a problem in the brain stem. (msdmanuals.com)

These tissues are supplied by the two branches of the 8th cranial nerve (the vestiblocochlear nerve), which transmits electrical impulses related to sound and balance back to the brain. (petplace.com)

This makes the nerve transmit pain signals that are experienced as stabbing pains. (greatgreenwedding.com)
Nerves are strands of tissue that transmit signals from the brain to the rest of the body. (mayoclinic.org)
These movement signals are relayed by the 8th cranial nerve to the brain, including the CRTZ (chemoreceptor trigger zone). (willmydoghateme.com)

The vestibular nerve splits into two branches: the inferior and superior vestibular nerves. (medifocus.com)
The anterior superior alveolar nerves, branches of the infraorbital nerve (from CN V2), run in canals in the anterior wall of the maxillary sinus and innervate the upper incisors, canines, premolars, and often part of the first molar. (unboundmedicine.com)
The inferior alveolar nerve (from CN V3) runs in the mandibular canal, giving off branches to the lower teeth and gingivae as it passes. (unboundmedicine.com)

This illustration shows a schwannoma of the tibial nerve in the leg. (mayoclinic.org)

Acoustic neuromas arise with equal frequency on the superior and inferior portion of the vestibular nerve. (medifocus.com)
the inferior alveolar nerves innervate the lower teeth and gingivae. (unboundmedicine.com)

It is not recommended with streptomycin or other medications that may damage the auditory vestibular nerve. (wikipedia.org)
Vestibular nerve function has not been extensively studied in ANSD. (entandaudiologynews.com)

The glossopharyngeal nerve (cranial nerve IX) is responsible for swallowing and the gag reflex, along with other functions. (greatgreenwedding.com)
When the origin could be identified, almost all these tumors were histologically proved to be schwannomas of the glossopharyngeal nerve. (ajnr.org)

The cochlea contains the nerves that transmit the electrical impulses and is directly responsible for hearing. (petplace.com)
Nerves with axons that conduct electrochemical impulses toward the central nervous system (CNS) are afferent, nerves with axons that conduct impulses away from the CNS are efferent, and nerves with both afferent and efferent axons are mixed. (unboundmedicine.com)
A sympathetic nerve to the heart that carries impulses that speed the heart rate. (unboundmedicine.com)
A nerve that conducts impulses toward the brain or spinal cord. (unboundmedicine.com)

They often involve the third ventricle, optic nerve, and pituitary gland. (indiasurgerytour.com)

RESULTS: House-Brackmann grade is the most widely used system to assess facial nerve function among working group members (81%), although more than half (54%) agreed that the system they currently use does not adequately estimate the risk of associated complications, such as corneal injury, and confidence in interrater and intrarater reliability is generally low. (bvsalud.org)

Frank embedding of nerve fibers was more frequent in NF2. (thejns.org)

But they can lead to pain, nerve damage and loss of function in the affected area. (mayoclinic.org)
Gliomas grow inside the cerebrum's star-shaped glial cells, which support nerve function. (uclahealth.org)
As with the other aminoglycosides, on rare occasions changes in renal and eighth cranial nerve function may not become manifest until soon after completion of therapy. (nih.gov)
From these data, we plan to develop a simple, clinically anchored, and reproducible staging system with regional scoring for assessing early postoperative facial nerve function after surgery of the skull base, cerebellopontine angle, temporal bone, or parotid gland. (bvsalud.org)

Acoustic neuromas typically remain encapsulated and, as they grow, they slowly displace surrounding tissue and nerves. (medifocus.com)

Rather, the tumors compress the nerves that promote facial sensation and facial muscle movement. (facialparalysisinstitute.com)

When the nerve becomes swollen (right box), the brain can't interpret the information correctly. (greatgreenwedding.com)
Electronystagmography is a test that looks at eye movements to see how well nerves in the brain are working. (medlineplus.gov)
involves attaching electrodes to the head to record electrical activity from the hearing nerve and other parts of the brain. (wikipedia.org)
The cranial nerves originate in the brain stem. (msdmanuals.com)

Neurofibromas are often found growing on the nerves and in organs. (uhhospitals.org)

This disorder is typically identified by the growth of tumors on the nerves. (ihealthdirectory.com)

The test is used to determine whether a balance or nerve disorder is the cause of dizziness or vertigo. (medlineplus.gov)
Is auditory neuropathy spectrum disorder a disorder of the whole eighth cranial nerve? (entandaudiologynews.com)

What causes damage to the 8th cranial nerve? (greatgreenwedding.com)

Alcohol, ammonia, and other irritants, which test the nociceptive receptors of the 5th (trigeminal) cranial nerve, are used only when malingering is suspected. (msdmanuals.com)

OBJECTIVE: The objective of the current study was to present the results of an international working group survey identifying perceived limitations of existing facial nerve grading scales to inform the development of a novel grading scale for assessing early postoperative facial paralysis that incorporates regional scoring and is anchored in recovery prognosis and risk of associated complications. (bvsalud.org)

Arterial compression of the cochleovestibular nerve complex has been suggested as a potential cause of hearing deficit, typewriter tinnitus, and equilibrium disturbance or vertigo. (ajnr.org)
If acoustic neuromas go undiagnosed and untreated, they can cause severe compression of the eight cranial nerve that impacts hearing and balance. (facialparalysisinstitute.com)

Anatomy4

Diseases5

Psychiatry and Psychology3

Phenomena and Processes3

Anthropology, Education, Sociology and Social Phenomena1

Information Science1

Health Care1

Vestibulocochlear8

Cochlear nerve13

Benign12

Blood vessels2

Abducens2

Auditory nerve3

Neurologic disorders2

Peripheral nerves4

Tumor18

Seventh crani1

Trigeminal nerve7

Sheath3

Inner ear9

Dysfunction2

Palsy5

Posterior3

Acoustic neuroma2

Olfactory1

Tumors grow2

Ganglia2

Pathology2

Near nerves1

Disorders3

Sensory3

Examination1

VAGUS4

Symptoms2

Abnormal1

Transmits1

Signals3

Branches3

Schwannoma1

Inferior2

Vestibular nerve2

Glossopharyngeal nerve2

Impulses4

Optic nerve1

Assess1

Fibers1

Function4

Tissue1

Sensation1

Brain4

Organs1

Typically1

Disorder2

Damage1

Nociceptive1

Facial paralysis1

Compression2