Damage to the basal ganglia is most likely to produce which type of presentation according to the break hypothesis?

• A. Uncontrolled, unwanted bodily movements and difficulty initiating movement
• B. Complete inability to move regardless of intent
• C. Enhanced gross motor activity with precise timing
• D. Loss of sensation in the limbs

Answer: (A)

The main idea here is that the basal ganglia act like a brake on movement, helping us suppress unwanted actions and start the movements we intend. The break hypothesis captures what happens when this braking system is disrupted: motor output becomes poorly controlled because there’s less inhibition of competing or involuntary motor programs, and selecting and initiating the intended action becomes harder.

Damage to the basal ganglia thus tends to produce a mix of symptoms: movements can occur that are unwanted or excessive (uncontrolled, involuntary movements), and at the same time there can be trouble starting or initiating a voluntary movement because the system isn’t properly releasing the brake for the chosen action. That combination fits the described presentation.

Why the other possibilities aren’t as fitting: complete inability to move regardless of intent would be a severe loss of motor function not typical of basal ganglia brake problems. an environment of enhanced gross motor activity with precise timing would suggest effective, well-tuned motor control, which isn’t characteristic of basal ganglia dysfunction. loss of sensation in the limbs is a sensory deficit, not a motor control issue, and points to different brain regions or pathways.