Sound intensity required to elicit stapedial reflexis more than:
**Core Concept**
The stapedial reflex, also known as the acoustic reflex, is an involuntary reflex that occurs in response to high-intensity sound. It involves the contraction of the stapedius muscle in the middle ear, which helps to protect the ear from loud noises. This reflex is mediated by the **auditory nervous system**.
**Why the Correct Answer is Right**
The correct answer is related to the threshold of sound intensity required to elicit the stapedial reflex. Research indicates that the stapedial reflex is typically elicited by sound intensities greater than 80-90 decibels (dB) above the individual's hearing threshold.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the sound intensity required is actually higher.
**Option B:** This option is also incorrect as it does not accurately represent the threshold for the stapedial reflex.
**Option C:** Similarly, this option is incorrect as it underestimates the sound intensity required.
**Clinical Pearl / High-Yield Fact**
The stapedial reflex is an important clinical indicator of middle ear function and can be used to assess **hearing loss** and other auditory disorders.
**Correct Answer:** D. 70-80 dB above threshold