Final answer:
Major or Mild Neurocognitive Disorder due to Huntington's Disease is chiefly associated with motor dysfunction, including balance and posture problems, muscle rigidity, and speech changes, but also includes cognitive impairments.
Step-by-step explanation:
Major or Mild Neurocognitive Disorder due to Huntington's Disease is primarily associated with b. motor dysfunction. Huntington's Disease is a type of neurodegenerative disease that affects the nervous system, leading to symptoms such as slowed movements, balance and posture problems, muscular rigidity, and speech changes, as well as psychological symptoms like dementia. Specifically, the disorder is caused by the degeneration of neurons, which can lead to movement deficits that affect various aspects of neurological exams and the patients' quality of life. Although motor dysfunction is most commonly associated with Huntington's Disease, cognitive decline including difficulty with planning and executing tasks, poor judgment, and personality changes are also presenting symptoms. However, major or mild Neurocognitive Disorder is a broader term that encompasses a variety of cognitive impairments which can include disruptive memory loss and confusion about time or place, beyond just motor symptoms.