Fig. 3.

Camera lucida tracings of coronal sections of DLM demonstrating the dorsoventral pattern of connectivity within the DLM_DL→lMAN_core circuit in a 35 d bird. This bird received injections of RDA in the dorsomedial part (black injection site) and FDA in the dorsolateral part (white injection site) of lMAN_core, which are depicted in the schematic at top (above DLM sections). The resulting pattern of retrograde label in serial coronal sections of DLM indicated that RDA retrogradely labeled neurons within dorsal DLM_DL (black circles), whereas FDA retrogradely labeled neurons throughout ventral DLM_DL(open circles); dashed lines delineate DLM_DL from DLM_VM. A small number of neurons were also labeled within DLM_VM as a result of both tracers extending into small parts of lMAN_shell. Scale bar, 500 μm.