Assessing Topographic Structural Connectivity of the Human Basal Ganglia and Thalamus

Irtiza A. Gilani; Kader K. Oguz; Huseyin Boyaci; Katja Doerschner

In order to recheck the identified regions in the T1-weighted images, the CN was traced in the coronal plane by considering the white matter of the anterior limb of the internal capsule as the lateral boundary and the lateral ventricle as the medial boundary. The Pu, lateral to the CN, was also traced in the coronal plane. The internal capsule was considered as the medial boundary and the external capsule was taken into account as the lateral boundary. The corona radiata was marked as the superior boundary and the white matter of the retrolenticular limb of the internal capsule was used as the posterior boundary for tracing Pu. The GP was also marked in the coronal plane using as anterior border where it appeared medially to the Pu. The internal capsule was used to identify the superior and medial borders. The lateral border coexisted with the Pu and the inferior border was defined using the substantia innominata and the anterior commissure. The end of GP slice was marked where the GP vanished medially to the Pu. The region between the GPe and GPi was identified by using the medial medullary lamina as a separating structure.