Question

Rearrange the following in the sequential order of reception and transmission of sound waves from the eardrum –

External auditory nerve, eardrum, cochlear nerve, malleus, stapes, incus, cochlea

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Answer 1

Answer:

The correct order of reception and transmission of sound waves from ear drum is external auditory nerve--> eardrum--> malleus--> incus--> stapes--> cochlea--> cochlear nerve.

Explanation:

• The tympanic membrane receives sound waves from the world outside the outer ear. The concha, a cavity at the entrance to the external auditory canal, works with the auricle, the part of the outer ear that is visible, to collect sound waves and direct them into the external auditory canal.
• When sound waves reach the tympanic membrane, they are partially absorbed and partially reflected. The membrane only moves when a sound is absorbed.

• The mass, stiffness, and frictional resistance of the membrane, the ossicular chain, as well as the size of the impedance, are all related to each other.
• The cochlea is where complex sounds' various frequencies are separated out, or processed, and the cochlear nerve is where these sound vibrations' physical energy is converted, or transduced, into electrical impulses that are sent to the brainstem.

Therefore the correct order is external auditory nerve--> eardrum--> malleus--> incus--> stapes--> cochlea--> cochlear nerve.

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