Which movement disorder is characterized by cell death in the caudate nucleus?

Huntington's Disease is characterized by the degeneration of neurons in specific areas of the brain, particularly the caudate nucleus and the putamen, which are components of the basal ganglia. This cell death leads to the movement disorders and cognitive decline associated with the disease.

In individuals with Huntington's Disease, the loss of these neurons disrupts the normal balance of neurotransmitters that are essential for coordinating movement, resulting in the characteristic motor symptoms, such as chorea (involuntary movements), rigidity, and bradykinesia (slowed movements). The progressive nature of the cell loss leads to worsening symptoms over time, and is a key factor in diagnosing this disease.

Other movement disorders mentioned in the options have different underlying pathophysiologies, such as Parkinson's Disease, which primarily involves the death of dopamine-producing neurons in the substantia nigra, leading to distinct motor symptoms. Multiple Sclerosis is primarily an autoimmune condition affecting the central nervous system, while Alzheimer's Disease predominantly involves neurodegeneration in areas responsible for memory and cognition, rather than movement control.