Question

Where does the scala vestibuli start and scala tympani terminate respectively?

• A. Scala media, temporal bone
• B. Oval window, round window
• C. Pinna, tympanic membrane
• D. Eustachian tube, external auditory meatus

Answer 1

The correct option is B Oval window, round window

The scala vestibuli and tympani are parts of the cochlea which are parts of the inner ear.
The inner ear functions as the sensorineural receptor organ of the auditory system, converting an acoustic waveform into an electrochemical stimulus that can be transmitted to the CNS.

The scala vestibuli extends from the oval window, travelling above the cochlear duct, which is the central cavity of the cochlea that contains the sound-transducing neurons. At the uppermost tip of the cochlea, the scala vestibuli curves over the top of the cochlear duct. The fluid-filled tube, now called the scala tympani, returns to the base of the cochlea, this time travelling under the cochlear duct. The scala tympani ends at the round window.