Figure 5.

Tectal and pretectal neuronal representation of different directions of the missing-fundamental stimulus. (A) Raster of activity of the neurons responding to at least one of the 4 directions of the missing-fundamental signal, or to the static missing-fundamental or square-wave, in the optic tectum (n = 6 larvae). The imaged frames are sorted on the x axis so that stimuli of the same type are grouped together (separated by vertical red dashed lines). The neurons are sorted on the y axis according to the type of response they display (separated by horizontal blue dashed lines). (B) Examples of the activity of 2 neurons in the optic tectum that respond, respectively to the static square-wave signal (a), or to the static horizontal and vertical missing-fundamental (b). (C) Same as (A) for the pretectum (n = 6). (D) Examples of the activity of 5 neurons in the pretectum that respond, respectively to the static vertical and horizontal missing-fundamental signal and the static square-wave signal (c), or to the missing-fundamental signal going to the right (d), to the left (e), up (f) or down (g).