Sleep disorders
You're tired, but as soon as you get into bed, you can't fall asleep. Or perhaps you fall asleep easily but wake up several times a night. You might even be getting enough hours of sleep and still not feel rested in the morning.
When poor sleep persists, it can have a major impact on your daily life. Concentrating takes more effort, you become irritable more quickly, and everyday activities require increasingly more energy.
A sleep disorder occurs when the duration, quality, timing, or pattern of sleep is disrupted, affecting your ability to function during the day.
Sleep is much more than just a period of physical rest. During sleep, various brain networks are active, playing a role in memory, emotional processing, recovery, and the regulation of the nervous system.
Scientific research shows that sleep disorders can be linked to changes in the activity and coordination of the brain networks that regulate sleep and wakefulness.
At BRAI3N, we investigate and treat these brain processes using targeted neuromodulation.
Drawing on our neuroscience expertise, we examine how this treatment can help specific patients achieve better sleep quality and improved daily functioning.
What is it?
Why is sleep so important?
Our brains remain remarkably active during sleep.
They process information, strengthen specific neural connections, and support biological processes that are essential for our physical and mental well-being.
Sleep plays a role in, among other things:
- Memory and learning: processing new information and consolidating memories.
- Emotion regulation: processing emotional experiences and influencing responses to stress.
- Nervous system recovery: supporting processes that contribute to the maintenance and function of nerve cells.
- Metabolism and immune system: regulating hormonal, metabolic, and immune processes.
- Attention and concentration: preparing the brain to efficiently process information again.
When sleep is disrupted for a long period, these processes may not function as well.
This can lead to fatigue, concentration problems, emotional changes, and reduced resilience.
How does sleep work in our brains?
Sleep is regulated by a complex interplay of different brain regions.
An important component is the hypothalamus, which helps regulate our biological day-night rhythm.
In addition, the brainstem and the thalamus contain various systems involved in alertness, falling asleep, and the progression of sleep.
The cerebral cortex also plays an active role.
During sleep, different patterns of electrical brain activity alternate. These brain rhythms help organize sleep and support processes such as recovery, memory processing, and neuroplasticity.
The latter refers to our brain's ability to adapt its activity and internal connections.
The different sleep stages
Our sleep consists of different stages that repeat throughout the night.
Non-Rapid Eye Movement sleep (NREM sleep)
During these sleep stages, characteristic patterns of brain activity emerge.
In deeper NREM sleep, slow brain waves are observed, among other things. These play an important role in various recovery processes and memory functions.
So-called sleep spindles are also important. These are short periods of rhythmic brain activity that are involved in, among other things, processing memories.
Rapid Eye Movement (REM) sleep
During REM sleep, our brain activity becomes relatively high again.
This sleep stage is often associated with vivid dreams and is involved in processes such as emotional regulation and memory consolidation.
Healthy sleep requires not only sufficient duration but also the proper organization of these various sleep stages.
What happens during a sleep disorder?
Various processes can be disrupted in the case of sleep disorders.
Sometimes the issue lies with the biological sleep-wake rhythm. For other patients, breathing problems, physical ailments, or certain neurological conditions play a significant role.
In cases of chronic insomnia, a state of heightened alertness can also develop.
This is known as hyperarousal.
Even though a person may feel physically exhausted, certain systems involved in alertness and sensory processing remain highly active.
This can manifest as:
- Difficulty quieting the mind.
- A constant feeling of physical or mental tension.
- Hypersensitivity to sounds or other stimuli.
- Difficulty falling asleep, despite feeling tired.
- Frequent waking and difficulty falling back asleep.
- Worrying about sleep and the consequences of a poor night's rest.
For some patients, a vicious cycle can develop:
the more one tries to sleep, the harder it becomes for sleep to occur spontaneously.
Research into the involved brain networks offers new opportunities to better understand these processes and influence them in a targeted way.
What types of sleep disorders are there?
1. Insomnia
With insomnia, a person has difficulty falling asleep, staying asleep, or sleeping long enough, despite having adequate opportunity to sleep.
When symptoms occur at least three times a week, persist for three months or longer, and affect daytime functioning, it may be chronic insomnia.
These symptoms can be accompanied by hyperarousal, rumination, changes in sleep patterns, and disruptions to the sleep-wake cycle.
2. Sleep-related breathing disorders
In obstructive sleep apnea, breathing is repeatedly interrupted during sleep because the upper airway narrows or closes.
This can lead to fragmented sleep and cause fatigue and daytime sleepiness.
Loud snoring, pauses in breathing, and gasping for air during the night are key warning signs.
This condition requires a specialized sleep study and targeted treatment.
3. Circadian rhythm sleep-wake disorders
Our body has a biological clock that determines when we feel awake and when we feel sleepy.
When this clock does not align well with the desired day-night rhythm, sleep problems can occur.
Examples include sleep disorders caused by shift work, delayed sleep phase, and jet lag.
4. Sleep-related movement disorders
Restless legs syndrome causes an unpleasant sensation in the legs, especially during periods of rest, often combined with an irresistible urge to move them.
Periodic limb movements during sleep can also disrupt a good night's rest.
5. Excessive daytime sleepiness
Some people experience a pronounced need to sleep during the day.
This can be the result of sleep deprivation, sleep apnea, medication use, or specific neurological sleep-wake disorders, such as narcolepsy.
6. Parasomnias
Parasomnias involve unwanted behaviors or experiences that occur during sleep.
Examples include sleepwalking, nightmares, and certain behavioral disorders during REM sleep.
Why do sleep disorders often co-occur with other conditions?
Sleep affects almost all major functions of our brain.
That is why sleep problems are common in depression,anxiety disorders, chronic stress, and chronic pain. This relationship works both ways.
Chronic pain can disrupt sleep, while a poor night's rest can increase sensitivity to pain.
Also in fibromyalgia , non-restorative sleep, pain, and fatigue often play a significant role.
In anxiety and depression, changes can occur in brain networks involved in both emotion regulation and sleep-wake cycles.
That is why at BRAI3N, we always evaluate sleep complaints in conjunction with any additional neurological, physical, and emotional issues.
How to treat
Treatment that addresses the root cause
Not every sleep disorder requires the same treatment.
For chronic insomnia, cognitive behavioral therapy for insomnia (CBT-I) focuses on thoughts, expectations, and behavioral patterns that can perpetuate sleeplessness.
Depending on the situation, medication may also have a place in the treatment plan.
Other sleep disorders require a specific approach.
For sleep apnea, for example, treatment with continuous positive airway pressure (CPAP) may be indicated, while circadian rhythm disorders can be treated with methods such as targeted light exposure and adjustments to the sleep-wake schedule.
When sleep problems persist, it can be useful to specifically examine the brain processes involved in sleep and wakefulness.
This is the starting point of neuromodulation.
Neuromodulation: influencing brain networks involved in sleep
Neuromodulation is a treatment approach in which the activity of nerves and brain networks is targeted and influenced.
This is particularly interesting for sleep disorders because falling asleep and staying awake depend on the precise coordination of various brain regions.
These systems determine, among other things:
- How easily we fall asleep.
- How easily we fall asleep.
- How stable our sleep remains.
- How the different sleep stages are organized.
- How strongly our brains react to stimuli.
- How our brains switch between wakefulness and sleep.
With neuromodulation, we aim to influence specific processes within these networks.
Various techniques can be used for this, including transcranial electrical stimulation (tES)andtranscranial magnetic stimulation (TMS).
Other forms of neuromodulation, such as Neurofeedback, are also being studied for their potential impact on sleep rhythms and the brain networks involved in sleep-wake regulation.
What does scientific research show?
Scientific knowledge regarding neuromodulation for sleep disorders has expanded significantly in recent years.
Researchers have demonstrated that various stimulation techniques can influence the electrical activity of brain networks.
In certain patient groups, this is also associated with improvements in perceived sleep quality.
Electrical stimulation for chronic insomnia
In 2020, an article was published in Psychotherapy and Psychosomatics a randomized, double-blind, placebo-controlled study on transcranial alternating current stimulation (tACS) for chronic insomnia.
This study examined 62 patients.
Four weeks after the treatment period, approximately 53% of actively treated patients showed clinical improvement, compared to approximately 17% in the placebo group.
The researchers also found beneficial changes in sleep quality, sleep onset latency, total sleep time, and sleep efficiency, among other factors.
These results demonstrate that targeted electrical stimulation can have a meaningful impact on insomnia symptoms in selected patients.
Combining different forms of neuromodulation
In 2024, researchers published a clinical study in BMC Medicine on the combination of electrical and magnetic brain stimulation for chronic insomnia.
A total of 157 patients completed the study.
Participants received transcranial direct current stimulation (tDCS), repetitive transcranial magnetic stimulation (rTMS), or a combination of both over a four-week period.
The group that received both active forms of stimulation reported, on average, a greater improvement in sleep quality than the groups that received only one form of active stimulation.
The differences remained evident at the three-month follow-up as well.
This research supports the scientific premise that different forms of neuromodulation may complement each other when applied in a targeted manner.
Influencing brain rhythms during sleep
Another important area of research focuses on characteristic brain rhythms during sleep.
Slow oscillations and sleep spindles are central to this.
Researchers are attempting to influence these rhythms in a targeted way to support specific processes of sleep organization and neuroplasticity.
In some techniques, stimulation is adjusted based on real-time electrical brain activity. This is known as closed-loop stimulation.
This approach demonstrates how increasingly precise knowledge of brain activity can be translated into targeted neuromodulation.
How does BRAI3N translate these insights into practice?
At BRAI3N, we start from scientific knowledge regarding brain networks and their role in sleep and wakefulness.
We look not only at how many hours someone sleeps, but also at the factors contributing to the onset and persistence of the symptoms.
For some patients, heightened alertness and constant mental activity are at the forefront. For others, stress regulation, emotional issues, or underlying neurological processes play a significant role.
Based on these insights, we investigate whether neuromodulation can be a meaningful addition to existing treatment.
Available clinical studies provide valuable starting points for this. The choice of treatment depends on the type of sleep disorder, personal history, and the specific symptoms we aim to address.
Our goal is not only to understand scientific insights but to carefully translate them into options that can be relevant for patients today.
In doing so, we systematically monitor the effect of the treatment and adjust the plan whenever indicated.
The BRAI3N treatment process
1. Assessment
During an initial evaluation, we will discuss your sleep complaints, medical history, and previous treatments.
We will ask questions such as:
- Whether you have difficulty falling asleep or staying asleep.
- How long the sleep problems have been occurring.
- How many hours you sleep on average.
- Whether you feel sufficiently rested after sleeping.
- What impact these symptoms have on your daily functioning.
- Whether stress, pain, emotional issues, or other neurological symptoms are present.
Where appropriate, sleep questionnaires and a sleep diary may be used.
If sleep apnea or other specific sleep disorders are suspected, additional testing at a specialized sleep center may be necessary.
AnqEEG measurement and analysis provides additional information about electrical brain activity.
2. Targeted treatment
Based on the clinical evaluation, we will determine which treatment best addresses your symptoms.
When neuromodulation offers a useful complementary option, we will discuss which brain processes can potentially be influenced.
The treatment can be combined with other forms of sleep therapy or with the treatment of co-occurring conditions.
3. Stabilization
Throughout the treatment process, we will monitor how your sleep and daily functioning evolve.
We look at factors including:
- The time it takes to fall asleep.
- The number of nighttime awakenings.
- Your perceived sleep quality.
- Daytime fatigue and mental clarity.
- The impact of sleep issues on daily activities.
The treatment will be adjusted as necessary.
4. Maintenance
As your sleep improves, we will look at how to best maintain this progress.
Depending on your situation, further medical follow-up, sleep coaching, or a maintenance program may be beneficial.
Not every patient requires the same treatment or follow-up.
Are your sleep problems persisting?
Do you regularly lie awake, wake up often during the night, or feel constantly exhausted during the day?
When previous treatments have not provided sufficient improvement, it may be useful to also examine the neurological processes involved in sleep and wakefulness.
BRAI3N is an international center of expertise for neuromodulation, where science and patient care converge. Through close collaboration between neuroscientists and clinicians, scientific insights are carefully translated into clinical practice.
During an initial evaluation, we will discuss your symptoms, previous treatments, and whether neuromodulation could be a complementary treatment option for your personal situation.
Contact us for a no-obligation consultation or to schedule an appointment
Scientific Background
Hacking the functions of sleep: noninvasive approaches to stimulate sleep neurophysiology
Krugliakova E, Breuer F, Adelhöfer N, Alonso A, Besedovsky L, Murphy K, et al.Physiological Reviews. 2026;106(2):675–749.
Neuromodulation in sleep disorders
Qatanany B, Uzma N, Nizam A, Kaur S, Kamali AM, Nami M.Progress in Brain Research. 2026;300:221–265.
The Future of Non-Invasive Brain Stimulation in Sleep Medicine
Krone LB, Song SH, Jaramillo V, Violante IR.Journal of Sleep Research. 2025;34.
Brain stimulation techniques as novel treatment options for insomnia: A systematic review
Krone LB, Fehér KD, Rivero T, Omlin X.Journal of Sleep Research. 2023;32.
Can Neuromodulation Improve Sleep and Psychiatric Symptoms?
Luff CE, de Lecea L.Current Psychiatry Reports. 2024;26(11):650–658.
Zhou Q, Liu Z, Yu C, Wang Q, Zhuang W, Tang Y, et al.BMC Medicine. 2024;22:538.
Wang HX, Wang L, Zhang WR, Xue Q, Peng M, Sun ZC, et al.Psychotherapy and Psychosomatics. 2020;89(1):38–47.
Yu J, Wu Y, Wu B, Xu C, Cai J, Wen X, et al.Journal of Translational Medicine. 2022;20:601.
Stefanowski B, Koceniak P, Antczak J, Rusin G.BMJ Open. 2025;15.
The European Insomnia Guideline: An update on the diagnosis and treatment of insomnia 2023
Riemann D, Espie CA, Altena E, Arnardottir ES, Baglioni C, Bassetti CLA, et al.Journal of Sleep Research. 2023;32(6).
Authors: Prof. Sven Vanneste, Prof. Dr. Dirk De Ridder and Jan Ost - 10/22/2026
Other conditions that we treat
Auditory and vestibular disorders
These disorders are related to hearing and balance and can have a major impact on your daily life.
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Neurological and cognitive disorders
These disorders affect brain function, which can lead to problems with attention, memory, and motor skills.
Mental and emotional disorders
Mental illness can be deeply rooted in neurobiological dysfunctions.
Chronic Pain and Fatigue Syndromes
Chronic pain and fatigue are often difficult to treat with conventional methods, especially when there is no obvious physical cause.
Fatigue syndromes and sleep disorders
Sleep and energy management are essential for brain function. Problems in these areas can lead to severe tiredness and difficulty concentrating.
Headache and facial pain disorders
Headaches and facial pain can result from complex neurological processes.
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