Which of the following are common types of sleep studies performed?

The selection of polysomnography and multiple sleep latency test as common types of sleep studies performed is accurate, as both are integral components of sleep medicine. Polysomnography is a comprehensive overnight test that records various physiological parameters during sleep, such as brain activity, eye movements, muscle tension, heart rate, respiratory effort, and blood oxygen levels. This allows for a detailed analysis of sleep stages and the identification of sleep disorders like sleep apnea, insomnia, and periodic limb movement disorder.

The multiple sleep latency test is frequently performed following polysomnography to assess a person's tendency to fall asleep and the speed with which they do so. It is commonly used to diagnose narcolepsy and other sleep disorders characterized by excessive daytime sleepiness by measuring how quickly and how many times an individual falls asleep during the day in a controlled environment.

While other options mention relevant methodologies for assessing sleep, they don't encompass the use of both polysomnography and the multiple sleep latency test, which are widely recognized as standard practices in the evaluation of sleep disorders.