Figure 2.

Line drawings illustrating (a) ascending sensory pathways to and (b) descending pathways originating from the area dorsalis telencephali in teleosts, and an example of the input–output pathways involved in telencephalic visual processing that can be deduced from tract-tracing studies in (d) acanthopterygian teleosts (Ito et al. 1980; Ito & Vanegas 1983; Murakami et al. 1983; Yamane et al. 1996; Imura et al. 2003), in comparison with (c) the mammalian cortical circuit. Ve, common ventricle; tc, tela chorioidea. Other abbreviations are as in the text and those of figure 1.