Test of detecting damage to cochlea are all EXCEPT:
**Core Concept**
The question is testing the ability to identify the correct audiological tests used to assess damage to the cochlea. The cochlea is a spiral-shaped structure in the inner ear responsible for sound processing.
**Why the Correct Answer is Right**
The correct answer is the one that is NOT a test of cochlear function. Tests like pure tone audiometry (PTA) and speech audiometry are commonly used to assess cochlear function, as they measure the ability to detect and understand sounds. However, the correct answer is a test that assesses a different aspect of auditory function.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is a test of cochlear function. Pure tone audiometry measures the threshold of hearing for different frequencies, which is a key indicator of cochlear function.
**Option B:** This option is incorrect because it is a test of cochlear function. Speech audiometry measures the ability to understand speech, which is heavily dependent on cochlear function.
**Option C:** This option is incorrect because it is a test of brainstem function, not cochlear function. The auditory brainstem response (ABR) measures the electrical activity of the brainstem in response to sound, and is used to assess the integrity of the auditory pathway, including the brainstem.
**Clinical Pearl / High-Yield Fact**
The Weber test is a simple test used to assess lateralization of sound, which can be helpful in diagnosing unilateral sensorineural hearing loss or conductive hearing loss. In a patient with a unilateral sensorineural hearing loss, the sound will lateralize to the affected ear, while in a patient with a conductive hearing loss, the sound will lateralize to the normal ear.
**Correct Answer: C. Auditory Brainstem Response (ABR) is a test of brainstem function, not cochlear function.**