Final answer:
The dementia causing depression, motor symptoms, and apathy is associated with Parkinson's disease, which is a neurodegenerative disorder characterized by a loss of dopaminergic neurons resulting in both motor and cognitive symptoms.
Step-by-step explanation:
The type of dementia that can cause depression, motor symptoms, and apathy is most closely related to Parkinson's disease (PD). PD is a neurodegenerative disorder characterized by the loss of dopaminergic neurons in the substantia nigra, leading to hallmark motor symptoms such as tremor, bradykinesia, muscular rigidity, and postural instability.
As PD progresses, cognitive decline and psychological symptoms like dementia, depression, and anxiety can occur. While initially presenting primarily with movement difficulties, the progression of Parkinson's disease includes cognitive symptoms and depression, confirming the multifaceted nature of this disorder.