Auditory neuropathy spectrum disorder is caused by damage to which parts?

• A. Outer ear
• B. Inner ear or the nerves
• C. Middle ear bones
• D. Eardrum

Answer: (B)

Auditory neuropathy spectrum disorder arises from a disruption in neural transmission rather than a problem with sound entering the ear. The damage is to the inner ear’s sensory cells (inner hair cells) or to the auditory nerve itself, or the synapses between them. This neural-level issue means signals aren’t timed or carried properly to the brain, even if the outer ear, eardrum, and middle-ear bones are functioning normally. In practice, this distinguishes ANSD from conductive problems in the outer or middle ear, which affect sound transmission rather than neural processing.