Fig. 2.

Circular ideogram summarising a literature review of the STN afferent and efferent connectivity in mammals. For comparison, reported parasubthalamic connections are included but uniquely labelled. STN afferents are shown in red and efferents in blue. Para-STN afferents are in orange and efferents in pale blue. The width of each connecting ribbon represents the normalised proportion (as a percentage) of the respective connections. Refer to the Methods for details on how this was calculated. A summary of the data and articles reviewed can be found in Supplementary Material 2.