Hypnogely: An Overview

Introduction

Many of us have encountered or observed laughing during sleep. It is a common phenomenon linked to dreams that occur during rapid eye movement sleep. It is considered a natural response to something occurring in a dream. On awakening, dreams can be of different types, such as odd, bizarre, and not funny.

Sometimes, hypnogely may be linked to sleep disorders. In rare cases, it may be linked to a symptom of a neurological disorder.

What Is Laughing While Asleep?

Laughter is considered to be healthy for everyone. Some people laugh during sleep. It is observed very well by parents. They often observe their baby laughing during sleep. It has been observed not only in children but also among adults. Hence, it is considered to be a natural process. It may happen to anyone. Unless it causes any other issues, it is considered harmless.

When Does Sleep Laughing Occur?

Laughing in sleep may occur during a specific part of our nighttime sleep. That part is known as REM (rapid eye movement) sleep. In this phase of REM, one can observe decreased body tension, increased heart rate, and eye movement. The REM stage of sleep is also called dream sleep. Generally, individuals dream during this phase of sleep. Many people utter words and laugh during this phase, and they are not aware of this the next day.

What Are the Common Causes of Hypnogely?

Laughing in sleep or hypnogely may be because of many reasons. These include:

• Dreams: Hypnogely usually occurs during dreams. Based on dreams, whether humorous or joyful, the brain triggers laughter. Laughter during sleep happens in response to dreams that occur during REM sleep. The dream stage is linked with heightened brain activity. This stage also accompanies emotional responses. Hence, the laughter is manifested as a response. It is found to be common in occurrence.

• Parasomnia: It is a type of sleep disorder. In this condition, an individual may show different types of activities, including laughing during sleep. These actions may be in response to the body's failure to remain in a paralysed state during the REM sleep stage.

• Medications: Medications, like antidepressants or antipsychotics, can be responsible for causing sleep laughing as a side effect.

• Stress and Anxiety: Stressful or anxious situations during waking hours can manifest in a variety of ways during sleep, including laughing.

• Sleep Disorders: These conditions can affect sleep regularity and comfort. Sleep laughing can be observed among those with sleep disorders, like REM sleep behavior disorder (RBD), narcolepsy, or sleep apnea.

• Genetics: Some research has suggested that sleep laughing may have a genetic component and may run in families.

What Is REM Sleep?

REM is a stage in the sleep cycle. This is characterized by rapid eye movements, vivid dreams, and temporary muscle paralysis.

During REM sleep, one can observe an active brain, but the body experiences near-complete paralysis, excluding specific muscles responsible for eye movement, breathing, and heartbeat.

REM sleep typically occurs many times throughout the night. Each cycle lasts around 90 to 120 minutes. REM sleep is believed to play a main role in memory, learning processes, and the regulation of emotions. Reduced REM sleep is linked to many health issues, like depression, anxiety, and cognitive decline.

In REM sleep behavior disorder (RBD), individuals physically act out their dreams during the REM sleep stage. In this condition, we can observe reduced or absent muscle paralysis during REM sleep. This causes individuals to act out their dreams physically. This disorder is often observed with neurodegenerative conditions such as Parkinson's disease and can pose risks of self-inflicted injury or harm to others.

What Are the Different Stages of Sleep?

There are five stages of sleep. They are grouped into two categories. These include non-REM (NREM) sleep and rapid eye movement (REM) sleep.

In the night cycle, these two stages keep alternating throughout the night. Each cycle lasts around 90 to 120 minutes. The different stages of sleep include:

• Stage 1 NREM: This stage lasts only a few minutes and is the lightest stage of sleep. At this point, the body starts to unwind, and the brain waves slow down.

• Stage 2 NREM: A further decline in heart rate and body temperature characterizes this stage, which lasts for around 20 minutes. Slower brain waves are still present, along with sleep spindles and K-complexes, which are bursts of quick brain activity.

• Stage 3 NREM: This is a deep stage of sleep, also called slow-wave sleep. Brain waves are slow, and it is difficult to wake someone up during this stage. However, this stage is important for physical restoration and growth.

• Stage 4 NREM: This stage is also part of slow-wave sleep and is the deepest stage of sleep. In this stage, we can expect to have extremely slow brain waves. Waking someone up during this stage can cause confusion and disorientation.

• REM Sleep: This is the stage of sleep where rapid eye movements occur, and dreams are most vivid. Muscles are paralyzed, and heart rate and breathing can become irregular.

Why Do Babies Laugh During Sleep?

Many babies laugh, smile, or make other facial expressions during their sleep. Babies' sleeping hours are different from those of adults. In the initial months of life, babies sleep in short cycles. A short cycle of sleep involves alternating active and quiet periods. Newborns also sleep a lot. They sleep almost 17 hours a day, but they cannot stay asleep for long periods. This means that throughout the night, babies experience different stages of sleep.

During different stages of sleep, they can experience a positive response to dreams. They laugh in response to the dream content. It is common among infants as well as in young children.

Babies can start to laugh in their sleep as early as a few weeks old. It is common for them to make a variety of sounds during sleep, including coos, gurgles, and even brief bursts of laughter. This is because babies spend a significant amount of time in REM sleep, which is the stage of sleep when most dreaming occurs.

The exact reason babies laugh in their sleep is not fully understood. There are a few theories as to why this occurs. These include:

• Dreams: Babies are found to have dreams during their sleep. Laughing in sleep may be linked to the developing brain processing information and emotions, which may lead to positive dreams or experiences.

• Physical Reflex: When laughter in sleep is considered a reflex, it is similar to sneezing or hiccups. In such cases, babies giggle. One can observe that the baby’s whole body jolts.

• Brain Development: The parts of the brain that regulate emotion and social interaction are still developing in infants, and laughter during sleep may be a normal part of this process.

• Genetics: There may be a genetic component to why some babies laugh during their sleep. Some babies are more predisposed to this behavior than others.

Babies and young children frequently laugh as they sleep, and this is generally not cause for concern. Yet, suppose the baby also exhibits other symptoms, such as frequent awakenings or strange movements, in addition to laughing while sleeping. In that case, this may point to a more serious condition that needs to be examined by a medical expert.

Is Hypnogely a Sign of a Sleep Disorder?

Hypnogely is generally considered normal, but it can be a sign of a sleep disorder. In some of the conditions, like parasomnia, individuals act out their dreams. It is also called REM behavior disorder. In some of the seizures where a person’s CNS (central nervous system) is affected, one can observe hypnogely. If laughter is observed in NREM sleep without any parasomnia symptoms, it may be a sign of a neurological disorder.

If a person exhibits unusual behaviors along with hypnogely and if it is frequent, then this condition may be taken seriously and further investigations should be done.

How to Diagnose Hypnogely?

Hypnogely cannot be identified on its own. It has to be tracked for its symptoms during sleep.

1. History: The affected person's sleep history should be asked, with others accompanying them. The details usually involve the number of times the hypnogely occurs during sleep and whether it is associated with movement, talking, or waking. They also ask for sleep timing, mood changes, and whether daytime sleepiness is present.

2. Diary of Sleep or Observation by Bed Partner: The sleep pattern should be noted down for two to four weeks. A bed partner can observe and tell about the laughter, whether it is louder or disturbing, or whether it is associated with abnormal behaviour.

3. Polysomnography (Sleep Study): This test helps to observe sleep and activities during sleep overnight. It observes brain waves, eye movement, breathing, and muscle activity. It helps identify REM sleep behavior disorder (RBD), sleep seizures, and parasomnias.

4. EEG (Electroencephalogram): If epileptic laughter is suspected, an EEG is used to check the brain activity and abnormal electrical discharge.

5. Imaging Techniques: MRI (Magnetic resonance imaging) and CT (computed tomography) are used to determine if any abnormal structures are present in the brain.

6. Psychiatric or Psychological Assessment: A psychiatry specialist may assess a patient to determine certain mental health issues related to the patient. Questionnaires may be used to evaluate.

What Are the Treatment Options for Hypnogely?

Hypnogely generally does not need any treatment except waiting and watching. However, if the hypnogely is frequent, intense, and long-lasting, it may require medical attention. In such cases, the exact cause of the hyponogely must be recognized. Based on the identified cause, treatment options may be considered.

Other lifestyle changes, such as maintaining sleep timing every day, eating a light meal before bedtime, and avoiding caffeine, alcohol, and nicotine before sleeping, might help. Apart from this, meditation techniques should be adapted to tackle stress, anxiety, and emotional disturbances. The bedroom should be kept soothing and warm, and have a good environment.

Conclusion

Laughing while sleeping is a common phenomenon in children as well as among adults. It may not need any treatment unless it occurs frequently and is associated with abnormal behavior. Children generally laugh during sleep, which is normal. It is very difficult to differentiate between normal and abnormal conditions even for a physician. Hence, one should be aware of hypnogely in detail. Knowing the condition completely helps to identify it early. Sometimes the hypnogely may be due to psychiatric conditions that require attention and treatment.

Key Takeaway From iCliniq

Laughing while sleeping is not a pathological condition unless it occurs often and is accompanied by abnormal behavior. It is a normal phenomenon among children and adults. If any underlying condition is present with hypnogely, it must be identified and treated. For more details, you can contact us at icliniq.com.