Question

module: nervous
topic: structures / type: combination

what structure is highlighted?

a. spiral ligament of cochlea
b. scala tympani
c. stria vascularis
d. vestibular membrane
e. cochlear duct

Explanation:

Identify the highlighted structure

Using the Cochlea Histology and Scala Tympani knowledge points

The histological section shows the cochlea of the inner ear, which is divided into three fluid-filled chambers within each turn:

1. Scala vestibuli: The upper chamber, filled with perilymph.
2. Cochlear duct (scala media): The middle chamber, filled with endolymph.
3. Scala tympani: The lower chamber, filled with perilymph.

In the provided image, the green highlighted regions are located at the floor of the lower chamber (scala tympani) of each cochlear turn, specifically highlighting the lining of the scala tympani.

Answer:

• A. Spiral ligament of cochlea
• B. Scala tympani (Correct answer)
• C. Stria vascularis
• D. Vestibular membrane
• E. Cochlear duct