A 60-year-old patient has impaired perception of high-frequency sounds. These changes were caused by damage of the following auditory analyzer structures:

Answer options

1. Main cochlea membrane near the helicotrema
2. Tympanic membrane
3. Middle ear muscles
4. Eustachian tube
5. Main cochlea membrane near the oval window

Explanation

The organ of Corti, or spiral organ, is the receptor organ for hearing and is located in the mammalian cochlea. High-frequency sound is located near the base of the cochlea (near the round and oval windows), while the low-frequency sound is located near the apex (helicotrema) and the middle frequency sound, the middle part of the helix.