Where does auditory information travel after leaving the cochlea?

• A. The auditory nerve
• B. The auditory cortex
• C. The inferior colliculus
• D. The superior olivary complex

Answer: (A)

The important idea is how auditory signals move right after they leave the ear. Once sound is transduced in the cochlea, the neural information is carried by the auditory nerve, also called the cochlear nerve. This nerve is the bundle of fibers from the spiral ganglion that channels the signals into the brainstem, where the first central relay occurs in the cochlear nucleus. From there, the information continues to other brainstem and midbrain centers and finally to the auditory cortex for higher processing. The auditory cortex is farther along the pathway, and the inferior colliculus and superior olivary complex are subsequent relay stations, not the immediate destination after the cochlea. So the best answer is the auditory nerve.