Deafness and hearing loss in Cats

The structure of a cat’s ear is similar to that of the human being is largely: one divides the ear into outer ear, middle ear and inner ear. The inner ear is over the iix. Head nerves (n. Vestibulocochlear) connected to the brain; The information about these nerves are consistent with those of the organs and the equilibrium organ that also sits in the ear.

The outer ear is made of ear and the outer ear canal to the eardrum. On the other side of the

Eardrum is the middle ear with the ossicular, the so-called oval window with the inner ear, which is in the skull bone is connected. To the inner ear belongs the snail (cochlear-hence the name of the nerve) with the actual organ as well as the equilibrium organ.

The middle ear is air-filled, in the inner ear there are two special liquids, the peri-and the endolymph.

The hearing works as follows:

Sound is passed over the outer ear and puts the eardrum in vibration. The vibration of the eardrum transfers to the Ossicular and thus on the oval window. Beyond the oval window, in the inner ear, the liquid, the endolymph, set in motion. This is located in the snail, where the actual organ, the Corti organ, sitting. The Corti-organ consists of so-called sensory cells, which are above the IIx.

Brain nerve impulses send to the brain when they are moved. Different pitches (frequencies) cause their impulses at different points in the Cortiorgans, which results in the understanding of the language in a healthy ear.

The damage caused to deafness or numbness, can therefore lie in quite different places. But, ultimately to the same result one divides them into conductive-(damage of the middle ear) and sensorineural disorder (damage to the inner ear). Vestibulocochlear deafness, in which the injury in the course of the nerve.

The classic cat deafness is probably the congenital with white, blue eyed cats. It is associated with a gene. That the fur is particularly white and the eyes are extremely bright. The defect is inherited as an autosomal dominant trait, breeding with affected animals falls into the Category and is prohibited. In sections of these animals, the reason for the deafness found: These animals show in the overwhelming. The majority of cases, or a stunted plant of the Corti Institution.

Most commonly acquired cause of a deafness is the damage to the vestibulocochlear nerve, e.g. by a tumor or injury to the nerve itself and/or the surrounding.

Brain tissue. This form of deafness or deafness is usually one-sided. But also noise can damage the ear of a cat, here is the Corti-organ itself affected; The sensory cells are damaged and lose your function. In the event of sustained exposure to high volume, the the inner ear is progressively damaged, result is an increasing deafness.

Different medications can also cause injury to the hearing. There would be certain Cytostatic (chemotherapy), an antibiotic group (aminoglycosides), certain disinfectants (applied directly to the ear) and certain diuretics, such as Furosemide. All these substances, however, are usually only serious illness, where one takes a hearing in purchase, because that’s definitely the lesser evil.

Affected Cats lack certainly hardly any quality of life. The animals arrange themselves well with their disabilities and find other ways of communication. It is usually also the cohabitation with other cats after a time of acclimation hardly problematic. What keepers of deaf cats report again and again is the loud shouting of the beasts. They do not hear their own voice, so there is no self-control. The whole is then not seldom so loud that it is in light hearing houses with neighbors can give problems. You will be able to get the Do not yell at the beast-it would not even understand what one wants from him. One can only try to give the cat as little reason to shout.

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