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Physician Board Certification

ABIM Sleep Medicine Initial Certification Examination Practice Test

Sleep medicine applies physiology and clinical reasoning to disorders that disrupt sleep, breathing, movement, or daytime alertness. Practice scenarios include insomnia and shift-work sleep problems, obstructive sleep apnea and positive airway pressure, narcolepsy testing and symptoms, parasomnias, sleep-related movements, and nocturnal oxygen desaturation. They ask you to connect patient history and test findings with safe, practical next steps.

Exam overview

Exam providerAmerican Board of Internal Medicine
Exam codeNot listed
CategoryPhysician Board Certification

About the ABIM Sleep Medicine Initial Certification Examination Exam

Clinical decisions in sleep medicine depend on distinguishing insufficient sleep or medication effects from a primary hypersomnolence disorder, and recognizing when an overnight polysomnogram must be assessed before interpreting a multiple sleep latency test. Scenarios also involve selecting behavioral measures for insomnia, addressing circadian challenges for daytime sleep after night shifts, and improving PAP tolerance when nasal symptoms interfere. Other questions test recognition of sleep paralysis, rhythmic jaw-muscle activity, and potentially hazardous sleepwalking, with attention to patient and household safety. Respiratory cases require considering how obstructive sleep apnea affects decisions about supplemental oxygen in a patient with nocturnal desaturation. Across these situations, the key skills are interpreting symptoms in context, identifying confounders, choosing appropriate testing or initial management, and matching interventions to the sleep disorder and associated risks.

Sample Practice Questions

Review a selection from this exam's published US Practice Tests practice bank.

Question 1

A patient taking a dopamine-blocking antipsychotic develops repetitive chewing movements during sleep. Which sleep-related movement disorder is most consistent with rhythmic jaw-muscle activity?

  1. ASleep bruxism
  2. BPeriodic limb movement disorder
  3. CPropriospinal myoclonus at sleep onset
  4. DSleep-related leg cramps
Show answerCorrect answer: A

Sleep bruxism consists of repetitive jaw-muscle activity, including clenching or grinding, during sleep. Medication effects and other clinical factors may contribute; evaluation should distinguish the behavior from other sleep-related movements and assess dental or jaw symptoms.

Question 2

A patient with chronic insomnia asks about stimulus control. Which instruction is most consistent with this technique?

  1. ARemain in bed until sleep occurs, even if awake for hours
  2. BUse the bed for sleep and leave it temporarily when unable to sleep
  3. CIncrease time in bed to compensate for poor sleep
  4. DCheck the clock every 15 minutes to monitor sleep onset
Show answerCorrect answer: B

Stimulus control strengthens the association between bed and sleep. Patients are generally advised to go to bed when sleepy, use the bed primarily for sleep, and leave it for a quiet activity if unable to fall asleep, returning when sleepy.

Question 3

A patient reports inability to sleep during a scheduled daytime sleep period after working overnight. Which environmental measure is most likely to improve the chance of obtaining daytime sleep?

  1. AUse a dark, quiet, cool sleep environment and limit interruptions
  2. BKeep the room brightly lit to strengthen sleep pressure
  3. CSchedule strenuous exercise immediately before attempting sleep
  4. DLeave television and phone notifications on throughout the sleep period
Show answerCorrect answer: A

Daytime sleep is often challenged by light, noise, and interruptions. A dark, quiet, cool bedroom and protected sleep interval can improve the opportunity for restorative sleep, although individual responses and work schedules also matter.

Question 4

A patient with obstructive sleep apnea and nasal congestion has difficulty tolerating PAP despite appropriate mask fit. Which adjunctive measure may improve comfort when nasal symptoms are present?

  1. ATreat the nasal congestion with appropriate evaluation and therapy
  2. BAdd an unprescribed sedative at bedtime
  3. CRemove the humidifier and avoid addressing nasal symptoms
  4. DReduce PAP pressure without reviewing device data or consulting the clinician
Show answerCorrect answer: A

Nasal congestion can interfere with PAP tolerance. Evaluating and treating the underlying nasal symptoms, and considering comfort adjustments with the treating clinician, is a reasonable approach; unsupervised pressure changes or sedatives are not appropriate substitutes.

Question 5

A 70-year-old has repeated episodes of falling asleep unintentionally during the day. He takes a sedating antihistamine at night and sleeps only about five hours because of caregiving duties. What is the best initial clinical step?

  1. ADiagnose a primary central hypersomnolence disorder based on sleepiness alone.
  2. BReview sleep duration and medication effects, and address these potential causes before specialized testing.
  3. COrder an MSLT without documenting the preceding sleep schedule.
  4. DPrescribe a stimulant before evaluating contributing factors.
Show answerCorrect answer: B

Insufficient sleep and sedating medications are common, potentially reversible contributors to daytime sleepiness. A careful history of sleep opportunity, schedule, medications, and other relevant conditions should guide initial evaluation before attributing symptoms to a primary hypersomnolence disorder or proceeding to specialized testing.

Question 6

A patient with narcolepsy describes brief episodes of being unable to move immediately after awakening. The episodes resolve spontaneously within a minute. Which phenomenon best describes this symptom?

  1. ASleep paralysis
  2. BCataplexy
  3. CConfusional arousal
  4. DPeriodic limb movement
Show answerCorrect answer: A

Sleep paralysis is transient inability to move at sleep onset or upon awakening, reflecting persistence of REM-related muscle atonia into wakefulness. Cataplexy is emotion-triggered loss of muscle tone during wakefulness.

Question 7

A patient with suspected narcolepsy undergoes overnight polysomnography followed by a multiple sleep latency test. Which overnight result is important to exclude before interpreting the daytime test?

  1. AAdequate total sleep time on the preceding polysomnogram
  2. BA single brief awakening after sleep onset
  3. CA sleep efficiency of exactly 100 percent
  4. DThe absence of any REM sleep during the night
Show answerCorrect answer: A

The preceding overnight polysomnogram should document adequate sleep and help exclude insufficient sleep and other causes of sleepiness before the MSLT. Inadequate sleep can confound daytime sleep latency and sleep-onset REM findings. Perfect sleep efficiency is not required.

How to use this practice test

The free practice bank contains 50 questions. Each session presents up to 20 random questions, and results appear after the session. Use a session to practice interpreting sleep histories, test sequences, PAP-related problems, and safety or treatment decisions; review missed items by identifying which clinical detail changed the next step.

Preparation tips

  • For daytime sleepiness cases, separate insufficient sleep and sedating medications from suspected narcolepsy; note what must be evaluated on overnight polysomnography before interpreting a multiple sleep latency test.
  • Practice matching insomnia and circadian complaints to specific measures, including stimulus control and environmental changes that support daytime sleep after overnight work.
  • Review obstructive sleep apnea management scenarios involving PAP modes, mask tolerance, nasal congestion, and the limits of supplemental oxygen when apnea is also present.
  • Distinguish sleep paralysis, sleepwalking, and rhythmic masticatory activity by their timing, observed behavior, and associated safety concerns.
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