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Cranial nerve 8, the vestibulocochlear nerve, goes to the middle portion of the brainstem called the pons (which then is largely composed of fibers going to the cerebellum). The 8th cranial nerve runs between the base of the pons and medulla oblongata (the lower portion of the brainstem).
The most common cerebellopontine angle (CPA) tumor is a vestibular schwannoma affecting cranial nerve VIII (80%), followed by meningioma (10%). The cranial nerves affected are (from most common to least common) : VIII (cochlear component), VIII (vestibular component), V Acoustic neuroma/vestibular schwannoma
Foville's syndrome is caused by the blockage of the perforating branches of the basilar artery in the region of the brainstem known as the pons. [1] It is most frequently caused by lesions such as vascular disease and tumors involving the dorsal pons.
Some sufferers (10–15%) report various pains growing in severity with progression of the disease. [1] The nerves most commonly affected are the peroneal nerve at the fibular head (leg and feet), the ulnar nerve at the elbow (arm) and the median nerve at the wrist (palm, thumbs and fingers), but any peripheral nerve can be affected.
Seizures and cranial nerve palsies may first occur in both early and late phases. [4] Eighth nerve palsy, interstitial keratitis and small notched teeth may appear individually or together; known as Hutchinson's triad. [4]
For partial nerve palsy, more than 80% of patients will recover completely. For complete nerve palsy, less than 40% of patients will have complete recovery. Peroneal nerve in continuity arises from defined cause will be recovered better than those arise from unknown causes. [7] Examinations are required for following reasons:
Middle alternating hemiplegia (also known as Foville Syndrome) typically constitutes weakness of the extremities accompanied by paralysis of the extraocular muscle, specifically lateral rectus, on the opposite side of the affected extremities, which indicates a lesion in the caudal and medial pons involving the abducens nerve root (controls movement of the eye) and corticospinal fibers ...
The cervical spinal nerve 8 (C8) is a spinal nerve of the cervical segment. [ 1 ] It originates from the spinal column from below the cervical vertebra 7 (C7).