Question

which frequency region is typically first affected in age-related sensory presbycusis?

• 250-500 hz
• 500-1000 hz
• 4000-8000 hz
• 125-250 hz

Explanation:

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"concepts_used": [
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<reasoning>

Identify the pathology and its physiological characteristics

Using the Presbycusis and Age-Related Hearing Loss knowledge points

Sensory presbycusis is characterized by the degeneration of the organ of Corti, specifically affecting the hair cells and supporting cells at the basal turn of the cochlea.

Determine the affected frequency region

Using the Tonotopic Organization knowledge point

Because the cochlea is tonotopically organized with high frequencies processed at the base and low frequencies at the apex, degeneration of the basal turn first affects high-frequency hearing, typically in the range of \(4000\text{–}8000\text{ Hz}\).
</reasoning>

<answer>
<mcq-option>(A) 125–250 Hz</mcq-option>
<mcq-correct>(B) 4000–8000 Hz</mcq-correct>
<mcq-option>(C) 500–1000 Hz</mcq-option>
<mcq-option>(D) 250–500 Hz</mcq-option>
</answer>

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Answer:

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<reasoning>

Identify the pathology and its physiological characteristics

Using the Presbycusis and Age-Related Hearing Loss knowledge points

Sensory presbycusis is characterized by the degeneration of the organ of Corti, specifically affecting the hair cells and supporting cells at the basal turn of the cochlea.

Determine the affected frequency region

Using the Tonotopic Organization knowledge point

Because the cochlea is tonotopically organized with high frequencies processed at the base and low frequencies at the apex, degeneration of the basal turn first affects high-frequency hearing, typically in the range of \(4000\text{–}8000\text{ Hz}\).
</reasoning>

<answer>
<mcq-option>(A) 125–250 Hz</mcq-option>
<mcq-correct>(B) 4000–8000 Hz</mcq-correct>
<mcq-option>(C) 500–1000 Hz</mcq-option>
<mcq-option>(D) 250–500 Hz</mcq-option>
</answer>

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