Fig. 1. Illustration of the two transplantation methods used in this study. (A) Accessory medulla (AMe)-grafts were exchanged between animals raised in 11 h:11 h L:D and 13 h:13 h L:D cycles. The left (in respect to the body axis) optic lobes were sectioned at least three weeks before the transplantations. (B) The AMe-grafts (in control experiments: medulla-grafts) were transplanted into the right antennal lobe of host animals. The remaining right optic lobes were subsequently removed. See Materials and methods for further details.