Fig. 2

Projection drawings indicate the sites of TMR injection into the thalamus and FG injection into the PBN in three rats (R4, R7, and R13). a Three different sections from rostral to caudal of the thalamus show the TMR injection sites confined in the VPM, the Po and their vicinities. b FG was injected into the left PBN, with the densest core (blackened areas) covering parts throughout the PBN and the KF. Scale bar 2 mm (a); 1 mm (b)