Question

Auditory cortex is located in the

• A. cerebellum
• B. hypothalamus
• C. cerebrum
• D. corpus callosum

Answer 1

The correct option is C cerebrum

The external ear receives sound waves and directs them to the ear drum. The ear drum vibrates in response to the sound waves and these vibrations are transmitted through the ear ossicles to the oval window. The vibrations are passed through the oval window on to the fluid of the cochlea, where they generate waves in the lymphs. The waves in the lymphs induce a ripple in the basilar membrane. These movements of the basilar membrane bend the hair cells, pressing them against the tectorial membrane. As a result, nerve impulses are generated in the associated afferent neurons. These impulses are transmitted by the afferent fibres via auditory nerves to the auditory cortex which is part of the cerebrum, where the impulses are analysed and the sound is recognised.

Hindbrain consists of three parts: pons, cerebellum and medulla oblongata.
Hypothalamus is part of the forebrain. It lies at the base of the thalamus.
Corpus callosum is a tract of nerve fibres that connects the cerebral hemispheres.