Caudate Delineation Protocol

The caudate nucleus was traced in successive 1 mm slices in the coronal plane. The caudate was subdivided into three defined subregions: the body, head, and caudate/putamen complex (Fig. 1). Anatomical anterior and posterior boundaries for each sub-region of the caudate were traced as follows:

The Body:

anterior – slice at which one can differentiate the foramen of monroe

posterior- slice where the junction between the left and right thalamus is first visible

The Head:

anterior – slice at which one can last distinguish the internal capsule

posterior- slice anterior to the one in which the foramen of monroe can be distinguished

The Caudate/Putamen Complex:

anterior – slice where the caudate/putamen complex is no longer visible

posterior- the slice anterior to the one in which you can last distinguish the internal capsule