What are the symptoms of brain nerve disorder?

Cerebral nerves refer to 12 pairs of cranial nerves, and each pair of nerve damage will show different symptoms. For olfactory nerve damage, common is cold, loss of smell, and in some degenerative diseases, such as Parkinson's disease, there can also be early loss of smell. Optic nerve damage can show visual field defects, decreased vision, visual distortion, etc. If the eye movement nerve is damaged, this time will show diplopia, that is, double vision, abnormal eye position or ptosis. If the trigeminal nerve shows problems, it will show abnormal facial sensation or reduced masticatory muscle strength. If the facial nerve shows problems, there will be facial muscle damage, such as mouth skew, weak eyes, the disappearance of forehead lines, etc., there will also be taste problems. If the acoustic nerve damage, there will be hearing loss, there will be dizziness symptoms. If the glossopharyngeal vagus nerve damage, it will cause swallowing difficulties, language pronunciation problems. If the hypoglossal nerve damage, it will show the deviation of the tongue. If the accessory nerve is damaged, there will be weak strength to lift the head, weak strength to turn the head and shrug, so each pair of cranial nerve damage has different symptoms.