Deafness is term used to describe complete or partial loss or absence of the ability to hear.
There are three major types of deafness
Conductive deafness is caused by a defect in the outer or middle ear, which prevents normal transmission of sound. It may be present at birth as the result of an inherited defect, an abnormality in development, or an infection of the fetus in the womb. It may be produced by an injury that perforates the eardrum or that breaks up the linkage of three tiny bones—hammer, anvil, and stirrup—that normally transmit sound from the eardrum through the middle ear to the inner ear. Inflammation of the middle ear, a condition known as otitis media, is another important cause of conductive deafness. Infection from an upper respiratory tract ailment, such as strep throat or the flu, can produce a buildup of pus in the middle ear so great that it ruptures the eardrum. Also, a plugged eustachian tube (the tube leading from the back of the throat to the ear) mat trap fluid in the middle ear, creating temporary deafness. Conductive deafness in the middle and later years is most often caused by otosclerosis. In this inherited condition, new spongy bone grows over the stirrup bone, preventing it from vibrating when sound travels to it through the hammer and anvil bones.
Sensorineural deafness is a type of hearing loss that occurs because of damage to the structures of the inner ear, to the auditory nerve carrying sound messages to the brain, or the hearing center of the brain itself, located in the temporal lobe. It may be due to a head injury during birth, the effects of a woman’s rubella infection on her unborn baby, a skull fracture affecting the inner ear or the auditory nerve, fever, bacterial or viral infections (such as mumps or meningitis), tertiary (final stage) syphilis, Meniere’s disease, tumors, multiple sclerosis, a hemorrhage or blood clot in the inner ear, drug side effect, normal aging, prolonged or repeated exposure to intense noise, or edema(fluid buildup) caused by a thyroid deficiency. Most sensorineural deafness is not nerve deafness, the popular term for it. It is usually sensory deafness, caused by defects in the structure of the inner ear, especially in the cochlea and its organ of Corti. The cochlea contains sensory cells that convert sound waves into electrical impulses, which are transmitted via the auditory nerve to the brain.
Mixed deafness is a relatively common condition. It is a combination of conductive and sensorineural deafness.
People with pure conductive deafness simply need louder volume to hear all sounds. Those with defects in the inner ear usually can hear low-pitched sounds more easily than high-pitched sounds, and some sounds may be distorted. When there is damage to the hearing center in the brain, the person may be able to hear sounds, but has trouble recognizing them and understanding words (this problem can also occur with the other types of deafness).
When hearing loss is suspected, a complete examination of the ears, nose, an throat is necessary to identify infections or abnormalities that may be present. Infections of the adenoids or tonsils, as well as sinus of nasal infections, may be linked to ear infections.
Testing of hearing is important for all ages, but especially for infants. Many times, partial deafness in a baby is not discovered until the child fails to learn to talk, a direct result of the hearing loss. Babies who were born prematurely or ill or whose mothers had certain viral infections, such as rubella, during pregnancy are in special need of testing.
Although inborn hearing defects usually cannot be corrected, deaf children can be helped to deal with their handicap. Starting very early, they can be fitted with hearing aids and can be instructed in lipreading, speaking, and sign language.
Surgery to correct conductive hearing loss includes operations to replace the stirrup bone or all three tiny bones with tissue or synthetic material, to repair a punctured eardrum, and to clean a chronically infected middle ear.
A hearing aid can often help to restore hearing. However, one should be purchased only after thorough testing by a specialist in audiometry, who can suggest the most appropriate type. Classes in lipreading and listening can also be helpful.
It is far easier to prevent deafness than to cure it. Antibiotics have made it possible to eradicate most of the middle ear infections that have been the major source of conductive hearing loss in children. Middle ear problems are also sometimes eliminated by treating allergies that cause the eustachian tubes to close up or by removing infected adenoids. Nerve deafness caused by continued exposure to intense industrial noise, gun shots, rock music, or aircraft engines may be avoided by wearing earplugs or other ear protectors. Some lost hearing may return after several months of relief form intense sound. Medications that can cause hearing loss, including some antibiotics and certain diuretics (drugs that stimulate the production of urine), need to be used with caution, and signs of hearing loss should be brought to a doctor’s attention as soon as they are noticed.
That's some stuff about Deafness types and treatment
(Chasnoff, Ira J, Jeffrey W. Ellis, Zachary S. Fainman. Family Medical & Health Guide .Publications International, LTD (1991) : 139-141)
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Until recently, many doctors suggested avoiding foods with small seeds because it was believed that particles could lodge in the diverticula and cause inflammation. However, this is now a controversial point and no evidence supports this recommendation. So the seeds in tomatoes, zucchini, cucumbers, strawberries and raspberries, as well as poppy seeds, which are part of your diverticulitis diet, are generally considered harmless.
Allergic Headache Certain types of headache are allergic in origin. In these cases patients develop headaches of variable severity when exposed to substances to which they are allergic. These may be food or inhalants. The symptoms vary with the person. As a rule, the pain is deep and sometimes throbbing, or it may acquire the characteristics of so-called sick headache or migraine. Not all instances of migraine are allergic in nature. When one realizes that chronic headache interfere with the patient's happiness and productivity, a serious effort must be made in each case to discover it cause. It must by no means assumed that every case of headache is allergic, because most frequently the cause of headache is something other than allergy. In the case of chronic recurrent headache one must always rule out some serious systemic condition like kidney disease, anemia, infection, or brain
TLC Diet Menu plan and GuideLines The Therapeutic Lifestyle Changes (TLC) Diet was devised by the U.S. government's National Cholesterol Education Program (NCEP) to give guidance to people who have blood cholesterol problems. The TLC Diet doesn't have a recommendation for how many calories people with cholesterol problems should eat daily because calories don't affect cholesterol levels directly.
Failure patterns of combined modality treatment in lung cancer By C.J. Hoekstra, H. Rijna, E.F. Smit, J.C. van Mourik, P.E. Postmus, A.A. Lammertsma, O.S. Hoekstra 17
Background: Patients with locally advanced non-small cell
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Now if you've never heard of dermabrasion, let me put this into perspective for you. "Derm" comes from the Greek word "Dermis", which means skin. "Abrasion" is the process of wearing down or rubbing away by means of friction. Put the two together and what do you get? Dermabrasion.
What is Pescatarian Definition and Recipes Are you looking for about what is pescatarian? and what are pescatarian recipes? A pescatarian is a person who refrains from eating land animals and birds, but includes fish, mollusks, and crustaceans in addition to fruits, vegetables, plants, legumes, nuts, and grains. This is a common form of “vegetarianism” and is generally considered a very healthy diet. It can also be a stepping stone to full vegetarianism. Pescatarians can enjoy lowfat protein sources that are high in fish oils, which contain Omega 3 fatty acids—the “good fats” that reduce inflammation.
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Misophonia symptoms and treatment What is Misophonia definition? Misophonia – literally the hatred of sound -can be defined as a hypersensitivity to background sounds or visual stimuli that are generally ignored by other people. More importantly than the individuals inability to block out the offending stimuli or “trigger” is the acute negative emotional response experienced as a direct result of being in contact with a trigger.
Misophonia commonly occurs along with hyperacusis and/or tinnitus, but can appear by itself. One of the tools we use to treat misophonia at AC Associates is called Tinnitus Retraining Therapy (TRT). TRT recognizes the specific involvement of various components of the auditory pathways of the nervous system in occurrences of tinnitus, hyperacusis and misophonia. For treatment of misophonia, TRT uses a method based on the active removal of conditioned reflexive responses to sound, allowing patients to feel like themselves again.
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