Dorsal extensions of the ALc branch. Stereo-view of a whole mount embryo illustrating the dorsal fibers emanating from the ALc. Lettering emphasizes the dorso-ventral level of the corresponding features, as in Figure 7. When seen with crossed eyes, this view will reveal two fibers climbing from the tip of the ALc projection, slightly anterior to the fibers that extend from the LT projection into the tectum (labeled 'LT to tectum'). The ALc fibers do not reach a level as dorsal as the LT fiber ramification, consistent with a target in the pretectal region of the embryonic brain.