00:01
Okay this question here says performing hearing and equilibrium test it says leads to possible causes of conduction deafness.
00:08
So first two possible causes of conduction deafness.
00:18
Okay one is going to be leakage or obstruction in the external auditory canal.
00:32
Okay and this can occur due to a factor such as an earwax that is a human built up and also foreign objects lodged in the ear or abnormal growth.
00:43
Okay so this is going to cause a conduction deafness.
00:46
Then another cause is going to be damage to the middle ear structures.
01:03
Okay conditions such as for example middle ear infections that is otitis media or perforated eardrum damage to the ossicles that are the tiny bones or on the of the middle ear or fixation of the ossicles can result in conduction deafness.
01:17
Okay then they are asking us also for two possible causes of sensory neural deafness and one cause of it is going to be damage to the cochlea.
01:40
Remember that the cochlea is a spiral shaped structure in the inner ear responsible for converting sound vibrations into electrical signals.
01:48
So damage to the or damage to the hair cells within the cochlea is crucial or maybe critical because remember that the function of these of these hair cells within the cochlea is very important for auditory signal transmission.
02:05
Okay and damage to them can lead to sensory neural deafness and causes of cochlear damage include exposure to loud noise, aging, some medications and also genetic factors.
02:23
Another cause of sensory neural deafness can be problems with the auditory nerve to auditory nerve.
02:37
Okay if the auditory nerve that carries electrical signals from the cochlea to the brain is damaged or impaired sensory neural deafness can occur.
02:45
Okay and this can result from conditions such as acoustic neuroma that is a benign tumor on the auditory nerve also viral infections such as mumps or measles or other neurological conditions affecting the auditory nerve.
02:58
Okay the next question here says what was the purpose of placing a cotton ball in the in the subject's external auditory canal during the weber test and the wien test...