Final answer:
Huntington's disease is the degenerative disorder characterized by both dementia and 'dance-like' movements, known as chorea.
Step-by-step explanation:
The degenerative disease characterized by dementia and 'dance-like' movements is Huntington's disease. This neurodegenerative disorder is known for the progressive death of neurons, particularly in areas of the brain that control movement and cognitive function. Patients with Huntington's disease experience a range of symptoms, including chorea (the 'dance-like' movements), cognitive decline leading to dementia, and psychiatric issues.
Parkinson's disease, another neurodegenerative condition, primarily causes symptoms such as muscle tremor,rigidity slowness of movement and postural instability. While Parkinson's disease can lead to dementia in its advanced stages, the hallmark 'dance-like' movements are specifically associated with Huntington's disease.