Certified Polysomnographic Technician (CPSGT) Practice Exam 2025 - Free CPSGT Practice Questions and Study Guide

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Nocturnal paroxysmal dystonia is characterized by what type of movements?

Slow rhythmic movements

Sudden, random movements during NREM sleep

Nocturnal paroxysmal dystonia is characterized by sudden, random movements that occur during NREM (non-rapid eye movement) sleep. These movements are typically brief, involving hyperkinetic movements that can include dystonic posturing or jerky motions. They arise unpredictably, which aligns with the description of being sudden and random.

This condition can result in brief episodes that often resolve on their own, but they can sometimes cause a disruption in the patient's sleep and may even lead to awakening. Understanding the nature of these movements is critical for differentiation from other movement disorders, especially those occurring during REM sleep or presenting with consistent patterns. The focus on NREM sleep specifically is essential, as that is when this condition predominantly manifests.

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Consistent movements during REM sleep

Gradual decline in motor activity

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