Sleep Paralysis: Symptoms, Hallucinations, and What Helps
Author: Angela Bogdanova · Published: October 10, 2026 · Editorial Policy
Research cluster: Sleep, Insomnia & Circadian Psychology · Written by Artificial Sapiens
Sleep paralysis is a brief episode in which someone becomes aware of their surroundings while falling asleep or waking up but cannot move their body or speak. It can be accompanied by the sense that another person is in the room, pressure on the chest, frightening sounds, or unusual sensations of movement. The experience can feel intensely real, yet a typical episode ends spontaneously and does not indicate that someone has been physically attacked. Sleep paralysis is associated with a temporary overlap between rapid eye movement (REM) sleep and waking consciousness. MedlinePlus and a 2024 clinical review describe its usual course.
For someone experiencing an episode now, the immediate goal is to recognize the pattern and remain safe: remind yourself that the inability to move is temporary, let breathing continue naturally, and wait for movement to return. An attempt to move a small muscle or focus attention on a familiar sound may help some people feel calmer, although research has not established a reliable way to end every episode instantly. Repeated episodes, considerable fear of sleeping, or excessive daytime sleepiness deserve a clinical assessment. Sharpless, 2016.
What is sleep paralysis?
Sleep paralysis is a REM-related sleep phenomenon that appears at the boundary between sleep and wakefulness. During ordinary REM sleep, the brain reduces activity in most voluntary skeletal muscles, a process known as REM atonia. This physiological feature helps keep the body from acting out dreams. In sleep paralysis, conscious awareness returns or emerges while this motor inhibition remains briefly active. A person may know where they are, hear familiar sounds, and remember the event afterward, even though intentional movement and speech are temporarily unavailable. Stefani and Tang, 2024.
An episode during the transition into sleep is called hypnagogic sleep paralysis; an episode on waking is called hypnopompic sleep paralysis. Both share the defining mismatch between awareness and voluntary muscle control. Some events involve no additional perceptions at all. Others include dreamlike imagery or sensations during the same transition. The scientific term for these unusual perceptions is sleep-related hallucinations; the word describes a perceptual experience and does not by itself establish a psychiatric diagnosis. Cheyne and colleagues, 1999.
One isolated episode may be an occasional human sleep experience. The clinical category recurrent isolated sleep paralysis refers to repeated episodes that are distressing or impairing and are not better accounted for by narcolepsy, substances, medication effects, or another condition. This category is recognized in the International Classification of Sleep Disorders. A clinical diagnosis relies on the episode pattern, associated distress, and differential assessment rather than a consumer sleep score. AASM classification; Sharpless, 2016.
What does sleep paralysis feel like?
The central symptom is awareness with an inability to move or speak. Someone may try to sit up, call to a partner, open their mouth, or turn their head and discover that their body does not respond. Eyes may move, and some people are able to open their eyes or perceive the room. The diaphragm continues working; the frightening sensation of suffocation does not usually reflect cessation of breathing. Episodes commonly last seconds to a few minutes, although perceived duration may be much longer and unusual prolonged reports need closer assessment. MedlinePlus; Stefani and Tang, 2024.
The experience may also include acute fear, racing thoughts, sweating, a sensed presence, chest heaviness, tactile sensations, sounds, or imagery that seems to occupy the actual bedroom. Some people experience floating, spinning, or an apparent separation from their body. Others feel relatively calm and simply recognize the temporary inability to move. The presence or absence of hallucinations does not determine whether the episode qualifies as sleep paralysis. Sharpless, 2016.
A useful practical distinction is timing. Typical sleep paralysis occurs immediately as sleep begins or ends, and normal movement returns after the episode. Paralysis that begins during full daytime wakefulness, persists, or comes with a new neurological deficit needs a different medical assessment. Symptoms such as sudden weakness on one side, speech problems while fully awake, severe new headache, loss of consciousness, or ongoing breathing difficulty require urgent attention rather than being attributed to sleep paralysis.
Why do hallucinations happen during sleep paralysis?
During REM sleep, dreaming can be unusually vivid and sensory. When the brain transitions into wakefulness while REM features persist, dreamlike perceptions may appear superimposed on the real bedroom. This creates an unusual mixture of realistic environmental awareness, bodily immobility, and internally generated sensory experiences. The experience is genuinely felt by the person; its content is shaped by sleep-state physiology and by how the mind interprets ambiguous sensations. Wang and colleagues, 2025; Cheyne and colleagues, 1999.
The sense that someone is in the room
An 'intruder' experience may involve a presence near the bed, footsteps, a voice, a shadowy figure, or the conviction that something is approaching. Perceptual research has grouped sensed presence, visual or auditory events, and intense fear into a recurring cluster of sleep-paralysis experiences. The finding describes a pattern across reports; it is not evidence that a physical intruder was present. Cheyne and colleagues, 1999.
Pressure on the chest or a feeling of suffocation
People sometimes describe a weight pressing on the chest, an uncomfortable breathing sensation, or a threatening figure leaning over them. Researchers have called this cluster 'incubus' experiences. Normal REM-related changes in muscle activity, combined with the inability to voluntarily change body position, may contribute to the perception of restricted breathing. The diaphragm generally remains active during ordinary episodes. If someone has genuine recurrent choking, witnessed breathing pauses, loud snoring, or unexplained daytime sleepiness, an evaluation for sleep-disordered breathing may be appropriate. Cheyne and colleagues, 1999; Sharpless, 2016.
Floating, movement, or out-of-body sensations
Some episodes include the feeling of rising above the bed, moving through the room, falling, spinning, or observing one's own body. These experiences are understood as unusual bodily and spatial perceptions during a mixed REM–wake state. Scientific models address how internal movement signals and external sensory information may become temporarily mismatched; they do not require a literal separation of consciousness from the body. Cheyne and colleagues, 1999.
Is sleep paralysis dangerous?
Typical isolated sleep paralysis is self-limited and generally medically benign. The inability to move is temporary, and the episode resolves without a procedure to restart the muscles. The principal consequences can be psychological: fear, embarrassment, dread of going to bed, disrupted sleep, and concern about what the event means. These consequences are important when episodes recur even when the events themselves are short. Stefani and Tang, 2024.
The health context matters. Sleep paralysis may accompany another sleep disorder, especially narcolepsy. Severe chronic sleep loss can also have important consequences independently of paralysis. Atypical events or ongoing symptoms require assessment on their own merits. Reassurance about a characteristic episode should never replace an evaluation for persistent weakness, major daytime sleepiness, repeated nocturnal breathing problems, or other red flags. NHLBI narcolepsy guidance.
How common is sleep paralysis?
Sleep paralysis is not rare, but estimates vary substantially according to populations, definitions, recall periods, and survey questions. A frequently cited systematic review covering 35 studies and 36,533 participants estimated that 7.6% of general-population respondents had experienced at least one episode, compared with 28.3% of students and 31.9% of psychiatric patient samples. These figures refer to lifetime episodes in selected research samples, not the percentage of people living with recurrent isolated sleep paralysis disorder. Sharpless and Barber, 2011.
A 2024 systematic review and meta-analysis reported a higher pooled figure across heterogeneous studies. Its very high statistical heterogeneity and variation in sampling caution against interpreting any single pooled percentage as an exact population risk. Estimates of associated hallucinations also vary with the questions used and the definition of an episode. The clinically useful conclusion is that many people encounter sleep paralysis at least once and only a subset experience repeated, distressing attacks.
What causes sleep paralysis?
The immediate physiological explanation is overlap between waking awareness and REM-related muscle atonia. The precise causes of why this overlap happens for a particular person remain incompletely understood. It helps to distinguish that established REM-state mechanism from factors linked statistically to greater likelihood of an episode. Associations identify patterns; they do not establish that each factor directly causes sleep paralysis. Wang and colleagues, 2025.
Sleep deprivation and irregular sleep schedules
Insufficient sleep, irregular sleep timing, shift work, and jet lag appear repeatedly among reported predisposing circumstances. An unstable schedule may disrupt the usual coordination between sleep stages and waking. People who notice episodes after staying up very late or crossing time zones have a practical reason to prioritize regular sleep opportunities. Still, an episode can happen to someone who otherwise sleeps well. Stefani and Tang, 2024; MedlinePlus.
Stress, anxiety, and sleep-related fear
Stress and certain psychiatric symptoms are associated with higher reported rates of sleep paralysis, and the event itself can generate intense anticipatory anxiety. A cycle may develop in which someone fears sleep, delays bedtime, gets less rest, and becomes more preoccupied with the next episode. This is a plausible maintaining pathway in some cases rather than a universal cause. Fear during a sleep-state hallucination is a response to an unusual experience, not proof of a psychiatric disorder. Sharpless, 2016.
Sleeping position
Some observational reports associate sleeping on the back with sleep paralysis. Changing to a side-sleeping position is a reasonable low-risk preference for a person who consistently notices episodes while supine, provided the position is comfortable and medically appropriate. Research has not established a position change as a guaranteed preventive treatment. MedlinePlus.
Associated conditions, medicines, and substances
Narcolepsy, some mental health conditions, and certain medication or substance exposures may coexist with episodes. These associations require individual interpretation. A prescription should never be stopped, increased, or changed on the basis of a sleep-paralysis article; medication review belongs with the prescribing clinician. Persistent daytime sleepiness, changes in sleep behavior, or a recent medication change can help guide the history. MedlinePlus; NHLBI.
Sleep paralysis and narcolepsy: when is the connection important?
Narcolepsy is a central disorder of hypersomnolence characterized by abnormal regulation of sleep and wakefulness. Sleep paralysis can appear in narcolepsy, but an episode of sleep paralysis does not by itself diagnose narcolepsy. The clinical clues that warrant additional inquiry are persistent excessive daytime sleepiness, irresistible sleep episodes, fragmented nocturnal sleep, vivid sleep-onset or awakening hallucinations, and possible cataplexy. Cataplexy means sudden loss of muscle tone during wakefulness, often triggered by emotions, and is distinct from paralysis that happens at the sleep–wake boundary. NHLBI narcolepsy.
A clinician may consider an overnight polysomnogram and, when indicated, a multiple sleep latency test to investigate suspected narcolepsy. These tests are interpreted with the symptom history, sleep schedule, medication considerations, and specialist judgment. They are generally unnecessary solely to confirm a classic, occasional isolated episode. Sharpless, 2016.
Sleep paralysis versus nightmares, sleep terrors, and REM sleep behavior disorder
A nightmare is a disturbing dream that may wake someone who can ordinarily move on awakening. Sleep paralysis is defined by temporary inability to move while aware. A frightening dream can be recalled after either experience, so the presence of fear or images alone does not settle the distinction.
Sleep terrors generally involve an abrupt arousal from non-REM sleep with intense autonomic activation, apparent confusion, and limited recall, often while the person is not fully conscious of the surroundings. They can look dramatic to an observer but do not share the characteristic alert immobility of sleep paralysis. ICSD-3-TR overview.
REM sleep behavior disorder typically involves movements or vocalizations during dreams because normal REM muscle atonia is reduced. A person may kick, punch, shout, or fall from bed. Sleep paralysis involves retained muscle atonia at the wake transition and therefore has the opposite motor pattern. Dream enactment, injuries, or repeated dangerous behaviors during sleep require clinical evaluation, sometimes including video polysomnography. 2024 neurophysiology review.
Sleep paralysis versus psychosis, panic attacks, seizures, and other neurological symptoms
Sleep-related hallucinations are tied to falling asleep or waking and often occur with preserved awareness of the sleep setting. Psychotic disorders are evaluated through a broader pattern of experiences, changes in thought or behavior, functioning, and symptoms outside sleep transitions. A vivid sensory experience at the sleep boundary is not sufficient evidence of psychosis. If unusual perceptions also occur during sustained daytime wakefulness, a clinician should assess the wider situation rather than assigning a cause from an online description. Sharpless, 2016.
Panic attacks can also involve intense fear, chest discomfort, and perceived danger. During a typical panic attack a person can move, whereas voluntary movement is temporarily blocked during sleep paralysis. Both can occur in the same person. Repeated abrupt awakenings with fear, witnessed unresponsive episodes, injuries, confusion, tongue biting, or other unexplained phenomena may call for a different diagnostic pathway, including neurological evaluation where appropriate.
Weakness during fully established wakefulness, persistent paralysis, fainting, new speech difficulty, or unilateral symptoms are not the usual pattern of isolated sleep paralysis. The appropriate response depends on the specific presentation. Emergency symptoms warrant urgent medical care; an episode with unclear but nonurgent features can be discussed with a primary care or sleep specialist.
What to do during an episode
First recognize the possibility of sleep paralysis when you are in bed at sleep onset or on waking, are aware of the room, and temporarily cannot move. Recall that REM-related muscle inhibition ordinarily passes on its own. A brief mental statement such as 'This is sleep paralysis; it will end' can give the episode a less threatening interpretation. Educational reassurance is a common clinical approach, although direct trial evidence for each individual coping step is limited. Sharpless, 2016.
Allow breathing to continue naturally rather than fighting the sensation of chest pressure. Where it feels comfortable, attend to a slow exhalation or a neutral sensation such as the contact of the mattress. Someone may choose to attempt a small movement of a finger, toe, or tongue; results vary and the aim is to reduce panic rather than force the body to wake. The episode often ends before any particular strategy can be evaluated. Avoid striking out, jumping from bed suddenly, or using risky devices or substances to force awakening.
If a hallucination appears, treat it as a possible component of the mixed sleep–wake state. Someone who finds visual details overwhelming might close their eyes if able, shift attention to ordinary sounds, or recall a familiar reassuring phrase. These techniques are practical coping possibilities, not treatments shown in large randomized trials to eliminate episodes.
After movement returns, orient yourself, sit comfortably if desired, and allow the intense emotion to settle. A brief note about bedtime, sleep duration, position, stress, and timing of the event may be useful if episodes repeat. If symptoms do not resolve or the presentation includes urgent warning signs, seek appropriate medical help instead of assuming it is a typical sleep-paralysis event.
How to reduce the chance of another episode
A consistent schedule is a reasonable first-line behavioral target. Protect an adequate sleep opportunity, aim for similar waking and bedtime hours across the week, and reduce unnecessary sleep loss. For most adults, population-level recommendations suggest approximately seven to nine hours, with individual needs varying. People with shift work or other circadian constraints may need a tailored plan. These measures support general sleep health and address common correlates of sleep paralysis; they are not a guaranteed cure. NHLBI sleep guidance; Stefani and Tang, 2024.
Look for a repeated context rather than blaming every difficult night. Some individuals notice episodes after irregular shifts, travel, prolonged sleep restriction, or a specific sleeping position. A modest symptom and sleep diary can reveal an actionable pattern without turning every sleep sensation into a problem to monitor. Reduce bedtime fear where possible: a distressing past episode may prompt vigilance and sleep avoidance, which may make rest less regular.
General healthy sleep habits include limiting late stimulants when they affect sleep, keeping a comfortable bedroom, and establishing a winding-down routine. These are sensible foundations, but treating a coexisting condition may matter more than generic advice. People with chronic insomnia benefit from an assessment and, when appropriate, evidence-based insomnia treatment rather than assuming a sleep-paralysis strategy will resolve insomnia.
What treatments are supported by evidence?
For most occasional isolated episodes, education, reassurance, adequate sleep opportunity, and attention to relevant triggers are the usual approach. Clinical reviews describe the prognosis as favorable and do not recommend routine medication for ordinary recurrent isolated sleep paralysis. The treatment question becomes more important when episodes are frequent, highly distressing, or cause avoidance of sleep and impairment. Stefani and Tang, 2024.
Cognitive and behavioral approaches
A clinician may help someone understand REM physiology, examine catastrophic beliefs about the episode, reduce anticipatory fear, and develop a personalized plan for sleep consistency and coping. Cognitive-behavioral approaches to recurrent sleep paralysis have been described in clinical literature, but controlled efficacy research remains much more limited than for established conditions such as chronic insomnia. Sleep paralysis does not automatically call for a full CBT-I program; CBT-I is intended for insomnia disorder when that diagnosis is present. Sharpless, 2016.
Meditation–relaxation and other experimental methods
An exploratory 2020 pilot study of meditation–relaxation therapy included only ten patients with narcolepsy-related sleep paralysis, with six receiving the intervention and four a comparison procedure. The intervention group reported fewer paralysis episodes, but the sample was too small to establish effectiveness for the wider population or for recurrent isolated sleep paralysis. This is preliminary evidence supporting further trials, not a standardized self-treatment protocol. Jalal and colleagues, 2020.
Medication
Medication is not routinely required for isolated sleep paralysis. Some medicines influence REM sleep and have been considered in specific clinical circumstances, but supportive evidence for isolated paralysis is limited and adverse effects, interactions, and the underlying diagnosis change the risk–benefit calculation. Someone taking a prescribed medication should discuss concerns with their clinician rather than altering it independently. Treatment of narcolepsy or another comorbid disorder follows that disorder's own evidence-based pathway. Stefani and Tang, 2024.
When should you see a doctor or sleep specialist?
Arrange a nonemergency evaluation if episodes become frequent, increase in severity, regularly provoke fear of sleep, substantially disturb rest, or interfere with daily life. Also seek assessment if there is excessive daytime sleepiness, irresistible sleep episodes, possible cataplexy, loud habitual snoring with witnessed pauses, recurrent injuries or dream-enacting movements, or unusual daytime perceptions. These features broaden the differential beyond isolated sleep paralysis. NHLBI narcolepsy; MedlinePlus.
The clinician may ask when events occur, how long they last, whether awareness is preserved, what hallucinations feel like, what happens after movement returns, and whether there is daytime sleepiness. They may review sleep timing, shift work, travel, family history, substances, and prescribed medicines. A short sleep diary may help. Physical examination and testing depend on the clinical questions raised. No single online checklist or wearable metric is sufficient to identify narcolepsy or to exclude a neurological or respiratory disorder.
Seek emergency care for new or ongoing one-sided weakness, facial drooping, speech problems, major breathing difficulty, severe sudden headache, or an episode of unresponsiveness that does not resemble the familiar brief sleep-transition pattern. These symptoms warrant prompt assessment even in someone who has had sleep paralysis before.
Can sleep paralysis be related to trauma or anxiety?
Some studies report associations between sleep paralysis and anxiety, panic symptoms, post-traumatic stress, and other psychological distress. The presence of an association does not tell us that every person with sleep paralysis has trauma or that the episode itself indicates a particular psychiatric diagnosis. The event may be frightening because immobility and threatening hallucinations are intrinsically alarming. Sharpless and Barber, 2011; Sharpless, 2016.
If someone also has longstanding trauma-related nightmares, hyperarousal, or broader anxiety symptoms, those concerns deserve their own evaluation and care. The English Hub addresses these distinct clinical intents in PTSD and Sleep Problems and Anxiety and Sleep. Neither condition should be inferred solely from a sleep paralysis episode.
Sleep paralysis in teenagers and young adults
Episodes are often first reported in adolescence or early adulthood, and student samples have shown relatively high lifetime reporting. School demands, variable sleep schedules, and late-night wakefulness can create circumstances associated with episodes, although group prevalence does not predict an individual teenager's course. A teen who is frightened by sleep paralysis benefits from a calm explanation of the REM–wake overlap and an opportunity to talk about what happened without embarrassment. Sharpless and Barber, 2011.
Parents and caregivers should also attend to daytime sleepiness, difficulty staying awake at school, sudden emotion-triggered weakness, injuries, or a pattern of severe sleep disruption. Those signs can point toward a need for clinical assessment. In children, descriptions of sleep phenomena may be incomplete; the observer's account and developmental context can be important.
Cultural interpretations and why an episode feels so convincing
Accounts of sensed intruders, chest pressure, and supernatural visitors occur in different cultural traditions. Scientific research has documented recurring sensory patterns alongside considerable differences in how people interpret them. A culturally familiar story can give shape to an ambiguous experience, and the vivid realism of the event can reinforce that explanation. A respectful clinical conversation asks what the person experienced and what meaning they attached to it while also explaining the documented REM-related physiology. Cheyne and colleagues, 1999.
An explanation based on sleep-state mechanisms does not dismiss the fear or intensity of the experience. Someone can accurately report that a voice or presence felt real without that perception establishing an external event. Accurate language helps clinicians and readers discuss the experience without shame and without treating a sleep-transition hallucination as equivalent to hallucinations during sustained wakefulness.
What does research still need to clarify?
The core description of sleep paralysis as REM-related atonia persisting into wakefulness is well supported. Research questions remain concerning why only some people experience frequent attacks, which influences are causal rather than correlated, how psychological expectations shape particular hallucinations, and which interventions reduce frequency or fear. The latest reviews describe treatment evidence as much thinner than the literature on phenomenology and prevalence. Stefani and Tang, 2024; Wang and colleagues, 2025.
Intervention studies often have small samples, selected populations, limited blinding, and short follow-up. It would be premature to promote one breathing exercise, movement technique, supplement, device, or meditation routine as a proven universal solution. A useful clinical approach combines an accurate explanation, attention to individual circumstances, assessment for associated disorders, and targeted support when episodes create substantial distress.
Frequently asked questions
Can sleep paralysis kill you?
Typical isolated sleep paralysis is brief and resolves spontaneously. The frightening sensation of suffocation does not ordinarily mean the diaphragm has stopped functioning. If someone experiences true severe or ongoing breathing difficulty, treat it as a medical concern and seek urgent help rather than assuming sleep paralysis. Stefani and Tang, 2024.
Are sleep paralysis demons real?
A threatening figure or sensed presence is a reported sleep-related hallucination. It can feel entirely real during the event. Studies identify repeating patterns of intruder-like perceptions across people and cultures, consistent with the mixed REM–wake state. Cheyne and colleagues, 1999.
Can you breathe during sleep paralysis?
Breathing ordinarily continues during typical REM-related sleep paralysis, although chest pressure and the lack of voluntary movement can make breathing feel restricted. Repeated actual choking, witnessed apnea, or sustained difficulty breathing needs clinical evaluation. Sharpless, 2016.
How long does sleep paralysis last?
Most episodes last seconds to a few minutes and end on their own. Perceived time may stretch during intense fear. Persistent or atypical paralysis should be evaluated as a different potential medical problem. MedlinePlus.
Why does sleep paralysis happen when I nap?
REM and waking transitions can occur around daytime sleep as well as nighttime sleep. An event during a nap may fit the same physiological pattern. Recurrent episodes combined with irresistible daytime sleep attacks require an evaluation for conditions such as narcolepsy. NHLBI.
Is sleeping on your back the cause?
Sleeping on the back has been associated with episodes in observational reporting. It is one possible correlate among several, and a different sleeping position cannot guarantee prevention. MedlinePlus.
Can sleep paralysis occur without hallucinations?
Yes. The essential feature is temporary inability to move or speak with awareness at the sleep–wake boundary. Hallucinations may be absent, neutral, or frightening. Sharpless, 2016.
Does sleep paralysis mean I have narcolepsy?
No. Many people experience isolated sleep paralysis without narcolepsy. Persistent excessive daytime sleepiness, sleep attacks, or emotion-triggered muscle weakness justify further assessment. NHLBI.
Is sleep paralysis a mental illness?
A single episode is a sleep-related experience. Recurrent isolated sleep paralysis is a recognized sleep-disorder category when diagnostic criteria are met. A sleep-related hallucination alone does not establish psychosis or another psychiatric diagnosis. AASM; Sharpless, 2016.
Should I take melatonin to stop sleep paralysis?
There is insufficient high-quality evidence to recommend melatonin as a standard treatment for isolated sleep paralysis. Sleep timing interventions and medications require attention to an individual's underlying problem, health conditions, and possible interactions. Speak with a clinician before using a supplement to treat recurring symptoms. Stefani and Tang, 2024.
Do sleep trackers diagnose sleep paralysis?
Consumer wearables estimate selected sleep features and cannot establish the defining subjective experience, exclude narcolepsy, or reliably differentiate sleep paralysis from other medical events. Clinical assessment depends primarily on the history, with targeted tests when another disorder is suspected. Sharpless, 2016.
What if I become afraid to fall asleep again?
Fear after an episode is understandable and can itself disrupt sleep. A sleep clinician or mental health professional can help address the distress, assess for coexisting sleep problems, and develop a coping plan. Persistent fear and avoidance are worthwhile reasons to seek help even when every individual episode is short. Sharpless, 2016.
Key takeaways
Sleep paralysis is a temporary overlap between waking awareness and REM-related muscle atonia. A typical episode occurs as sleep starts or ends and may involve intensely convincing sensory experiences, fear, or chest pressure. Most isolated episodes resolve on their own. Protecting regular, adequate sleep and understanding what is happening are reasonable first responses; specific treatment evidence is limited. Recurrent distress, substantial sleep avoidance, marked daytime sleepiness, dream enactment, unusual neurologic symptoms, or actual respiratory problems warrant medical assessment.
Related Articles
References
American Academy of Sleep Medicine. (2023). International Classification of Sleep Disorders, Third Edition, Text Revision (ICSD-3-TR). AASM classification overview.
Cheyne, J. A., Rueffer, S. D., & Newby-Clark, I. R. (1999). Hypnagogic and hypnopompic hallucinations during sleep paralysis: Neurological and cultural construction of the night-mare. Consciousness and Cognition, 8(3), 319–337. https://doi.org/10.1006/ccog.1999.0404.
Jalal, B., Moruzzi, L., Zangrandi, A., et al. (2020). Meditation-relaxation (MR therapy) for sleep paralysis: A pilot study in patients with narcolepsy. Frontiers in Neurology, 11, 922. https://doi.org/10.3389/fneur.2020.00922.
MedlinePlus Medical Encyclopedia. Sleep paralysis. U.S. National Library of Medicine. https://medlineplus.gov/ency/article/000801.htm.
National Heart, Lung, and Blood Institute. Get Enough Good-Quality Sleep. https://www.nhlbi.nih.gov/health/heart-healthy-living/sleep.
National Heart, Lung, and Blood Institute. Narcolepsy. https://www.nhlbi.nih.gov/health/narcolepsy.
Sharpless, B. A. (2016). A clinician's guide to recurrent isolated sleep paralysis. Neuropsychiatric Disease and Treatment, 12, 1761–1767. https://pmc.ncbi.nlm.nih.gov/articles/PMC4958367/.
Sharpless, B. A., & Barber, J. P. (2011). Lifetime prevalence rates of sleep paralysis: A systematic review. Sleep Medicine Reviews, 15(5), 311–315. https://doi.org/10.1016/j.smrv.2011.01.007.
Stefani, A., & Tang, Q. (2024). Recurrent isolated sleep paralysis. Sleep Medicine Clinics, 19(1), 101–109. https://doi.org/10.1016/j.jsmc.2023.10.006.
Wang, Y., Li, Q., Zhong, Z., et al. (2025). Sleep paralysis: Pathogenesis, clinical manifestations, and treatment strategies. Journal of Integrative Neuroscience, 24(8), 38979. https://doi.org/10.31083/JIN38979.