Figure 1.

Wiring sketch of the vCH-cell input circuit. Shown are those motion-sensitive input elements of the vCH-cell that have a horizontal preferred direction, as well as the postsynaptic FD1-cell. All input elements of the vCH-cell get retinotopic motion input (thick gray lines) from large portions of one eye. The H1 and H2 of the left brain hemisphere excite the vCH-cell of the right hemisphere, whereas the left Hu-cell inhibits it. The HSE-cell and the HSS-cell of the right side are electrically coupled to the vCH-cell, which inhibits the FD1-cell.