Wiring diagram based on the percentage measure representing the subcortical input to the PER areas 35 and 36, POR, LEA and MEA. Colors represent the afferent regions. Thickness of the bars represents the percentage of input to each target region. This measure is useful for comparing the pattern of inputs at the target regions. For example, PER area 35 receives a strong input from olfactory structures, whereas area 36 does not. Information for connections shown in grey are from prior studies (Agster and Burwell, 2013; Burwell and Amaral, 1998b). For simplicity, the weakest connections (<5%) are not shown but can be found in Table 3. All basal ganglia connections were below 5%. See Table 1 for a list of abbreviations.