Table 1.

Tracts included in principal component analysis

Network	Tract
Sensorimotor network	Primary Motor Cortex (M1) – Putamen
	Primary Motor Cortex (M1) – Motor Thalamus
	Premotor Cortex – Putamen
	Premotor Cortex – Motor Thalamus
	Primary Somatosensory Cortex (S1) – Putamen
	Primary Somatosensory Cortex (S1) – Somatosensory thalamus
Visual network	Inferior Fronto‐Occipital Fasciculus
	Primary Visual Cortex (V1) – Visual Thalamus
Limbic network	Uncinate Fasciculus
	Mid Cingulum
	Posterior Cingulum
Cognitive network	Dorsolateral Prefrontal Cortex – Caudate
	Dorsolateral Prefrontal Cortex –Prefrontal Thalamus
	Posterior Parietal Cortex – Parietal Thalamus
“Non‐HD”	Inferior Lateral Fasciculus
Interhemispheric tracts	Mid corpus callosum
	Posterior corpus callosum

Tractography was performed for all listed tracts. Diffusivity measures were extracted from each tract and included in our PCA analysis.