Certified Neuroscience Registered Nurse (CNRN) Practice Exam

Cerebellar tremors are primarily associated with which phase of movement?

1. Beginning of a movement

2. During acceleration

3. At the end of a movement

4. Throughout the entire movement

The correct answer is: At the end of a movement

Cerebellar tremors, also known as intention tremors, manifest primarily during the end phase of a movement. This neurological condition is indicative of disruptions in the cerebellum's ability to coordinate and fine-tune muscle activity. As individuals approach their target during a movement—such as reaching for an object or bringing a hand to a specific point—these tremors become more pronounced. The tremors result from a dysfunctional feedback loop within the cerebellum that hinders smooth, controlled motion, leading to shaking or oscillations as the person attempts to complete the movement. This oversight impacts the ability to adjust movements accurately when precision is required, particularly in the terminal phase of motion when fine motor control is essential. Thus, recognizing that cerebellar tremors predominantly occur at this stage highlights the nature of the cerebellum's role in coordinating and refining movements.