Hyperacusis

Introduction The hyperpneaful tympanic membrane that maintains the tympanic membrane is dominated by the pterygoid nerve of the trigeminal nerve branch, which is dominated by the facial nerve, and the two muscles maintain an equilibrium relationship. When the facial nerve is paralyzed, the iliac muscle is paralyzed. Therefore, the tympanic membrane is relatively tense, the tympanic membrane tension is high, and the tiny sound produces strong vibration, which causes hypersensitivity. It is seen in the lesion of the facial nerve above the branch of the sacral muscle. Clinically, hypersensitivity is not very rare. There are many diseases that may be complicated by this symptom. The most commonly mentioned is tinnitus. The so-called subjective idiopathic tinnitus refers to the sound that is unknown from the head of the head. An illusory auditory perception. As the gain of the central auditory system increases, the silent sound becomes vocal and the tinnitus is felt. Some people think that hypersensitivity is the predecessor of such tinnitus, and the two are related.

Cause

Facial nerve paralysis. The cause of the cause of the hearing path is faulty, the specific reasons have not been conclusive. Does not rule out the association with allergies (allergic reactions).

an examination

Related inspection

Otolaryngology CT examination otoscopy

The patient's symptoms can be diagnosed. In addition, patients with hypersensitivity should also pay attention to the relationship between hearing allergy and tinnitus: Many people are only hearing allergies at the beginning, but gradually develop into tinnitus in the end (the real tinnitus is to hear continuous sound whenever possible, It has caused a lot of psychological distress to the patients. At present, there is no effective treatment. Some of them may be cured. It may be that the condition is good. It has nothing to do with treatment. It is internationally recognized that there are no effective drugs and treatments. In addition to adaptation with TRT, it is recommended to perform an otoscopy.

Differential diagnosis

It should be differentiated from other diseases that can cause tinnitus and deafness.

Meningeal irritation

1. Headache, vomiting: headache is often severe, is the most common symptom, can appear early in the course of the disease. It is generally diffuse, and sometimes the occipital and forehead are particularly prominent. Vomiting is mostly jetting.

2. Neck muscle rigidity: neck muscle toughness is resistant to passive movement, such as passive neck flexion, muscle spasm and pain.

3. Klinefelter's sign: the hips and knees of the lower limbs are flexed to a right angle, and then the calves are straightened. Normally, the legs can be stretched up to 135° or more. In case of resistance, it is less than 135° and is positive when it is painful.

4. Brinell sign: the patient is lying down, passively flexing the neck forward, the two lower extremities are automatically buckling positive, which is the cerebellar meningeal irritation sign.

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