Auditory System 3
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| Define sensorineural deafness. | Results from disease to the cochlea, cochlear nerve, or connections due to old age, drugs/toxins, tumor, or Rubella. | |
| Define presbyacusis. | Organ of Corti degenerates, reduction in sound sensitivity and discrimination, impairments in sound localization, loudness perception, tinnitus. | |
| Describe Rinne’s test. | Hold tuning fork to mastoid process for bone conduction then to ear for air conduction. | |
| What is the purpose of Rinne’s test? | Differentiates between conduction deafness and sensorineural deafness. | |
| If a patient has a conduction loss what will Rinne’s test show? | Patient will not hear the tuning fork when it is placed in front of the ear. | |
| If a patient has a sensorineural loss what will Rinne’s test show? | Patient will have diminished response to both bone and air conduction. | |
| Describe the Weber test. | Tuning fork placed in center of forehead, sound should be heard in midline, if louder from one side = abnormal. | |
| If a patient has a sensorineural lesion, what will Weber’s test show? | Sound will be louder in the unaffected ear. | |
| If a patient has conduction deafness, what will Weber’s test show? | Sound will be louder in the affected ear. | |
| Define audiometry. | A specialized hearing test which can measure hearing thresholds at specific frequencies using earphones and tones. |
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