Auditory information about the frequency and intensity of stimulation is relayed to the CNS over the cochlear nerve, a division of cranial nerve
(a) IV
(b) VI
(c) VIII
(d) X

Verified step by step guidance

1. Step 1: Understand the question is asking which cranial nerve carries auditory information about frequency and intensity to the central nervous system (CNS).
2. Step 2: Recall that the auditory system transmits sound information from the cochlea in the inner ear to the brain via a specific cranial nerve.
3. Step 3: Identify the cranial nerves involved in sensory and motor functions. The cochlear nerve is part of the vestibulocochlear nerve, which is cranial nerve VIII.
4. Step 4: Recognize that cranial nerve VIII (vestibulocochlear nerve) has two divisions: the cochlear nerve (for hearing) and the vestibular nerve (for balance).
5. Step 5: Conclude that the correct answer is cranial nerve VIII, as it carries auditory information about frequency and intensity to the CNS.

Key Concepts

Cranial Nerves and Their Functions

Cranial nerves are twelve pairs of nerves that emerge directly from the brain, each with specific sensory or motor functions. Understanding their roles helps identify which nerve carries particular types of sensory information, such as auditory signals.

Cochlear Nerve

The cochlear nerve is a branch of the vestibulocochlear nerve (cranial nerve VIII) responsible for transmitting auditory information from the cochlea in the inner ear to the central nervous system. It conveys data about sound frequency and intensity.

Auditory Pathway to the CNS

Auditory information is processed through a pathway starting at the cochlea, traveling via the cochlear nerve to the brainstem and higher auditory centers. This pathway enables the perception of sound characteristics like pitch and loudness.