[Old Professer]

This part of one link I found when I Googled, "the snout of the camel is in the tent."

Summary 1. Electrophysiological recordings indicate that visual, auditory and somatosensory (cutaneous) modalities are principally represented in distinct loci in the midbrain of the frog,Rana pipiens. Visual inputs dominate activity in tectum; auditory and cutaneous inputs dominate activity in the medial and lateral torus semicircularis respectively (Figs. 1, 2, 3).

I hope this helps to elucidate your querulous imploration.

[Froufrou]

Yeah, but it shed absolutely no light on my question! ;o)