Scientists turn nightmares into pleasant dreams using audio (2023)

The key to preventing nightmares could be playing particular sounds into our ears through a wireless headband, a new study suggests.

In experiments, playing the sound of a piano during sleep reduced the risk of traumatic and fearful dreams for chronic nightmare sufferers.

Importantly, the piano sound had been linked with positive thoughts during the day when the patients were awake.

After receiving this new therapy, patients'nightmares decreased significantly and their positive dreams increased over time.

In therapy, dreamers may be coached to rehearse positive versions of their most frequent nightmares, but researchers in Switzerland take this a step further. They found that also playing a sound - one associated with a positive daytime experience - through a wireless headband during sleep may reduce nightmare frequency

After receiving this new therapy, the patients’ nightmares decreased significantly and their positive dreams increased (pictured)

The study has been led by experts at the University of Geneva and published today in the journalCurrent Biology.

THE NEW THERAPY

The new technique to combat nightmares is an adaptation of an existing therapy calledimagery rehearsal therapy (IRT).

IRTasks dreamers to change the negative storyline of a nightmare to a more positive ending - and rehearse this rewritten dream scenario during the day.

While IRT has shown some effectiveness, some patients do not respond to this treatment, so the team decided to adapt IRT using sound.

It involves creating an association between a positive version of a nightmare and a sound during an imagination exercise while awake.

Then, while asleep, this sound is played into the patient's ears using a wireless headband.

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'There is a relationship between the types of emotions experienced in dreams and our emotional well-being,' said study author Lampros Perogamvros at the Sleep Laboratory of the Geneva University Hospitals and the University of Geneva.

'Based on this observation, we had the idea that we could help people by manipulating emotions in their dreams.

'In this study, we show that we can reduce the number of emotionally very strong and very negative dreams in patients suffering from nightmares.'

Nightmares are considered 'clinically significant' when they occur frequently (more than one episode per week) and cause daytime fatigue, mood alteration and anxiety.

Prior studies have found that up to 4 per cent of adults experience nightmares at this clinically significant level.

One current form of therapy, known as imagery rehearsal therapy (IRT), coaches sufferers to rehearse positive versions of their most frequent nightmares.

IRTasks dreamers to change the negative storyline toward a more positive ending and rehearse the rewritten dream scenario during the day.

While IRT has shown some effectiveness, some patients do not respond to this treatment, so the team decided to adapt IRT.

To test whether sound exposure during sleep could boost success, Perogamvros and his colleagues gathered 36 patients, all receiving IRT.

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A team from Geneva has developed a promising new technique to help people experiencing nightmares. With this new therapy, the patients' nightmares were significantly reduced and their positive dreams increased (artist's impression)

IMAGES DURING NIGHTMARES VARY BY COUNTRY

Some nightmares might seem very common: being chased by an enemy, missing a train or sitting an exam without any preparation.

But night terrors not only differ from person to person – they might also vary from country to country.

Analysis of Google search data has shed light on the most unique nightmares around the world, which range from tornados, losing a limb and even going to work.

In the UK, bees are often a feature of more unique bad dreams, which could point to social anxiety or feeling out of place, experts say.

Read more

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Half of the group received IRT as normal, while the other half were required to try out this new form of therapy, involving sound.

'We asked the patients to imagine positive alternative scenarios to their nightmares,' said study author Sophie Schwartz.

'However, one of the two groups of patients did this exercise while a sound – a major piano chord – was played every 10 seconds.

'The aim was for this sound to be associated with the imagined positive scenario.

'In this way, when the sound was then played again but now during sleep, it was more likely to reactivate a positive memory in dreams.'

The people in this second group had to wear a headband that could send them the sound during REM sleep for two weeks.

REM is a kind of sleep that occurs at intervals during the night and is characterized by rapid eye movements – and it'swhere nightmares mostly occur.

At the end of the experiment, the frequency of nightmares decreased in both groups, but significantly more in the group where the positive scenario was associated with the sound.

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Both groups experienced a decrease in nightmares per week, the researchers found.

In humans, sleep is generally separated into 'non rapid eye movement' or NREM sleep and rapid eye movement or REM sleep. A typical night's sleep goes back and forth between the stages

But the half that received the combination therapy had fewer nightmares immediately post intervention, as well as three months later, and experienced an increase in positive dreams.

The researchers say this new combined therapy should be trialed on larger scales and with different populations to see how well it works.

'While the results of the therapy coupling will need to be replicated before this method can be widely applied, there is every indication that it is a particularly effective new treatment for the nightmare disorder,' saidPerogamvros.

'The next step for us will be to test this method on nightmares linked to post-traumatic stress.'

These results also open up potential new avenues for treating other disorders such as insomnia and other symptoms of post-traumatic stress, such as flashbacks and anxiety.

THE FOUR STAGES OF SLEEP

Sleep is generally separated into 'non rapid eye movement' or NREM sleep and rapid eye movement or REM sleep.

A typical night's sleep goes back and forth between the stages.

Stage 1:In the first five minutes or so after dropping off we are not deeply asleep.

We are still aware of our surroundings but our muscles start to relax, the heart beat slows down and brainwave patterns, known as theta waves, become irregular but rapid.

Although we are asleep during Stage 1, we may wake up from it feeling like we didn't sleep at all.

After around five minutes our bodies move into stage two.

Stage 2:This is when we have drifted into sleep, and if awakened would know you we been asleep. Waking up is still fairly easy.

This stage is identified by short bursts of electrical activity in the brain known as spindles, and larger waves known as K-complexes, which indicate that the brain is still aware of what is going on around it before turning off to a sub-conscious level.

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Heartbeat and breathing is slow, and muscles relax even further.

Our body temperature drops and eye movements stop.

Brain wave activity slows but is marked by brief bursts of electrical activity.

Stage 3:Stage 3 non-REM sleep is the period of deep sleep that we need to feel refreshed in the morning.

It occurs in longer periods during the first half of the night.

Our heartbeat and breathing slow to their lowest levels during sleep and brain waves become even slower.

Our muscles are relaxed and it people may find it difficult to awaken us.

The body repairs muscles and tissues, stimulates growth and development, boosts immune function, and builds up energy for the next day.

Hypnagogia - the transitional state between wakefulness and sleep - is associated with NREM stages one to three.

Mental phenomena during hypnagogia include lucid thought, lucid dreaming, hallucinations and sleep paralysis.

REM sleep: REM sleep first occurs about 90 minutes after falling asleep.

Our eyes move rapidly from side to side behind closed eyelids.

Mixed frequency brain wave activity becomes closer to that seen in wakefulness.

Our breathing becomes faster and irregular, and heart rate and blood pressure increase to near waking levels.

Most dreaming occurs during REM sleep, although some can also occur in non-REM sleep.

Arm and leg muscles become temporarily paralysed, which prevents us from acting out our dreams.

As we age, we spend less of our time in REM sleep.

Memory consolidation most likely requires both non-REM and REM sleep.

Source: US National Institutes of Health

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FAQs

What is the science behind nightmares? ›

Barrett says that in post-traumatic nightmares, the region of the brain involved in fear behaviors, including the amygdala, a structure deep in the brain that works to identify potential threats, may be overactive or overly sensitive.

Is dream Recording Possible? ›

It should be noted that a movie might be just a coarse approximation for a dream,” says Kamitani. So, it's clear we can't record dreams today.

Do people answer questions in their sleep? ›

Researchers demonstrate that during REM sleep, people can hear—and respond to—simple questions such as “What is eight minus six?” Dreams are full of possibilities; by drifting into the world beyond our waking realities, we can visit magical lands, travel through time and interact with long-lost family and friends.

What do psychologists say about dreams? ›

Some researchers think recurring dreams are the result of unsatisfied psychological needs. They believe that these dreams occur when a person experiences a long-term, unresolved conflict. Vivid dreams: Vivid dreams may be easier to recall due to their strong imagery. They may also feel more “real” than other dreams.

Are nightmares good for the brain? ›

Occasional nightmares, however uncomfortable, might have a few surprising psychological benefits: They may play a similar organizational role to dreams which help the brain consolidate and store memories. They may help the brain process intense emotion or challenging events, Barrett says.

Can nightmares be good for you? ›

But nightmares, while scary, aren't always a bad thing. In many cases, they may help the dreamer ameliorate some of their daytime anxieties. Research has found that nightmares can help some people learn to better manage stress.

Can audio influence dreams? ›

Sleep With Soothing Smells & Sounds

Though you may not dream directly of flowers when smelling roses, your memory's association with a scent can have an influence. Sounds that are loud enough to hear but not too loud to wake you can also become part of your dreams.

Is there audio in dreams? ›

Overall, the study provides evidence that auditory content is frequent in dream experiences, most commonly taking the form of other characters speaking, followed by the dreamer speaking and finally, other sounds.

Is there a machine that can read dreams? ›

The modified MRI machine can not only be used to read dreams but also to reconstruct dreams. When you wake up, you can replay the dream on the screen.

Can you laugh in your sleep? ›

Laughing during sleep, or hypnogely, is relatively common and is not usually anything to worry about. In most cases, researchers believe that the cause is laughing at a dream during rapid eye movement sleep, which is entirely harmless. In some cases, sleep laughing has links to sleep disorders.

Why do I scream in my sleep? ›

Sleep terrors are episodes of screaming, intense fear and flailing while still asleep. Also known as night terrors, sleep terrors often are paired with sleepwalking. Like sleepwalking, sleep terrors are considered a parasomnia — an undesired occurrence during sleep.

Can someone hear you when they sleep? ›

The study concluded that people do hear while they're sleeping! And we even process the sound we hear, and decide which sounds to pay attention to. This happens the most during Stage 1 and Stage 2. In another study, participants listened to words during short, light naps.

› bad-dream-more-just-dre... ›

The jolt of fear and terror felt as we run for our lives to escape danger quickly eases us back into consciousness in bed to help us flee the dreamscape. Nightm...
Many times dreams involve complex emotions and thoughts. If you've ever woken up and had a hard time separating your conscious from the dream state…
Why are dreams so weird, what are they for, and do they mean anything? Here's what science can tell us about our adventures in the land of nod.

Do nightmares have a purpose? ›

Dream experts believe the answer is yes, nightmares do serve a purpose. And though there's no single, united theory as to what that purpose might be, research is increasingly showing that nightmares could help people better navigate their waking lives.

What happens to your body during a nightmare? ›

It's common for people experiencing nightmares to show bodily symptoms of panic, including higher perspiration and a racing heart. The area of the brain responsible for these symptoms is the amygdala, the brain's "fear center," which shows a lot of activity during nightmares.

What are nightmares made out of? ›

In adults, however, nightmares occur as a result of a subconscious attempt to face any significant worries or traumas that a person may be living with. They generally take place during REM sleep, when the human brain produces proteins to stimulate learning.

Why are nightmares so scary? ›

Why are nightmares so frightening? Nightmares typically occur during rapid eye movement (REM) sleep when the brain is most active, but the body is in a state of temporary paralysis. “We remember dreams much better when we have them during REM sleep,” says Dr. Szumstein.

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