Question

The auditory input from the superior olivary nucleus travels via the lateral lemniscus to the inferior colliculus (midbrain). Each lateral lemniscus carries information derived from both ears, but input from the contralateral ear predominates. What is the pathway of auditory input from the superior olivary nucleus to the inferior colliculus?

1) Medial lemniscus
2) Ventral posterior nucleus
3) Dorsal cochlear nucleus
4) Inferior colliculus

Answer 1

The auditory pathway from the superior olivary nucleus to the inferior colliculus is via the lateral lemniscus, which carries predominantly contralateral ear information and is essential for sound localization.

Step-by-step explanation:

The pathway of auditory input from the superior olivary nucleus to the inferior colliculus is via the lateral lemniscus. This auditory pathway is involved in processing sound localization, which is based on the input from both ears. However, the information from the contralateral (opposite side) ear generally predominates. Once the auditory signals reach the inferior colliculus, they are further relayed to the thalamus, specifically to the medial geniculate nucleus, before being sent to the auditory cortex for conscious perception of sound.