In some people, there's also dryness of the affected eye or mouth because the facial nerve innervates the lacrimal, submandibular, and sublingual glands.
Peripheral nerves that originate from the brain are called cranial nerves, and they're in charge of motor and sensory innervation of the head and neck.
Since the trigeminal and sacral nuclei serve just one side of the face or body, herpes vesicles and ulcers develop on the ipsilateral or same side as the affected nuclei.
Acquired include 1. Neurogenic Basically, there is an innervation defect of the muscles, and because nerves supplying the muscles are not working, the muscles will be unable to work properly.
If the muscle does not receive any nerve fibers within twelve months, the muscle fibers are replaced by fibrous connective tissue, and the muscle is permanently lost.