DISEASES OF THE EAR : DEAFNESS - etiology, pathogenesis, symptoms and course of, recognition, prediction and prevention
Receptor of sounds is neuro-epithelial (kortiev) organ (part of the inner ear). Conductor of sounds serves as the outer and middle ear (auricle, external auditory canal, the tympanic cavity and its appendages). The organ of Corti is connected to the brain's auditory centers of the conductive auditory pathways. Hypoplasia or painful process in one of these units causes deafness: a) congenital b) acquired. Acquired deafness occurs more frequently than congenital. Acquired deafness is the result of infections (especially of epidemic cerebrospinal meningitis), disturbed metabolism, for example, in otosclerosis, and trauma. Shell shock (type of injury) can cause temporary inhibition of the auditory area of the cerebral cortex (extending Central or hysterical deafness) or profound morphological changes in the cerebral cortex or in the inner ear, accompanied by a detailed, often partial deafness after the cessation of Central inhibition.
For the detection of deafness in young children are: a) the Bekhterev reflex - discreetly brought to his ear the sound source causes a blinking of the eyelids or b) reflex Shurygina - quick contraction or dilation of the pupil, in) conditional reflex before feeding give an alarm within 30 seconds. After 3 to 4 weeks when you call, hearing the baby's sucking reflex (V. A. Feldman and S. I. Wolfson).
Continuous improvement of the sanitary conditions of the population, control of epidemic diseases, rehabilitation of the nose and nasopharynx in children.
Education of the deaf and hard of hearing with the help of visual perceptions, replacing hearing.