Thalamic Volume Is Associated with Dopaminergic Degeneration and Depressive Symptoms in Parkinson's Disease.
BACKGROUND The thalamus is a core node of the basal ganglia-thalamocortical circuit implicated in Parkinson's disease (PD) and depression. This study examined associations among thalamic volume ratio (TVR), nigrostriatal dopaminergic degeneration, and depressive symptoms in PD. METHODS We included 170 PD patients wit...