What is the seventh skull nerve?
cranial nerves are the nerves that come from the brain rather than in the spinal cord. There are 12 paired nerves. The seventh cranial nerve, facial nerve, comes from the brain stem between pony and medulla. It controls the movement of muscles on the facial expression. It is involved in the transmission of taste from sensors to the tongue to the brain and adds preganglionic parasympathetic fibers to the head and neck area.
The largest part of the seventh cranial nerve consists of branching of motor fibers. These fibers come from the nucleus of the face nerve in the pontch, part of the brain stem. Wrap motor fibers lead from pony to face muscles, where they control the movements connected to facial expressions such as smiling and frowning. The flicker is also partially controlled by this nerve. It also liberates digastric and stylohyoid muscles that are located under the chin.
The visceral motor part of the seventy -partial nerve causes submandibular and sublingual glands, two of the salivary glands in the mouth. The face of the nerve controls the production of saliva from these glands. Also controls productionTears through the tear gland in the eye.
The special sensory branch of the facial nerve expresses the feelings of taste from the back of the tongue to the brain. It also innervates the oropharynx, part of the neck that begins at the base of the tongue and includes almonds and a soft floor. The general sensory branch, the second part of the seventh skull involved in sensory stimuli, carries sensory signals from the small area of the skin behind the ear.
If a person is able to voluntarily move the face in typical expressions such as frozen, raised eyebrows or smile, the facial nerve works normally. Unintentional asymmetry, such as one side of the Institute of Smiles can indicate damage to the seventh skull nerve. The taste is generally tested by the tongue tongue flavored with a cloth, and if the front of the tongue is able to taste, it can also be a sign of potential damage to the face nerves.
lesions on the seventh skull nerve such as those that occur inFig. Fig. Face paralysis is another possible disorder involving the seventh skull nerve. Facial paralysis can be caused by lymph disease or some types of viruses.