A laboratory experiment on a dog was used to study central parts of auditory system. One of the mesencephalon structures was destroyed. The dog has lost the orienting response to auditory signals. What structure was destroyed?

Answer options

1. Reticular formation nuclei
2. Substantia nigra
3. Red nucleus
4. Inferior colliculi of corpora quadrigemina
5. Superior colliculi of corpora quadrigemina

Explanation

Inferior colliculi of corpora quadrigemina contain the auditory nucleus and several auditory pathways. Note that the Superior Colliculi has to do with vision.