What is Sleep?
Although everyone needs to sleep to maintain their health, the question “what is sleep?” has proven surprisingly difficult. During the state of sleep, the brain exhibits profound changes.
It is now believed the function of sleep is to clear metabolic waste products from the pathways of the brain. This helps explain why healthy sleep must be sufficient in both duration and depth.

What Conditions Are Associated With Sleep?
The most common health condition associated with sleep is insomnia. Insomnia is difficulty falling asleep, staying asleep, or both. Sleep disturbances can be physiological in nature (for example, Restless Legs Syndrome) or psychological (for example, nightmares.)
Experts have estimated that about 25% of Americans develop some degree of insomnia in any given year. In 75% of cases, it passes without long-term damage to sleep habits.
Other common sleep disorders include:
- Snoring
- Sleep apnea, “pauses” in breathing often caused by soft tissue blockage in the airway
- Sleep hypoventilation, trouble breathing in sleep caused by respiratory muscle weakness
- Restless Legs Syndrome, which causes discomfort only alleviated by moving the legs
- Bruxism, the grinding of the teeth during sleep, which can damage the teeth and jaw
Sleep medicine experts also recognize several less common sleep disorders. These include things like narcolepsy, nightmares and night terrors, and Rapid Eye Movement Behavior Disorder.
Maintaining Sleep Health
Many chronic sleep conditions arise with no known cause. However, maintaining good sleep hygiene can help. Sleep hygiene refers to the whole collection of habits that affect sleep health.
In general, it is a good idea to develop a consistent bedtime and routine for “going to bed.” Discontinue the use of phones and other “screens” an hour before bed, since the blue light of these devices inhibits the brain’s natural response to reduced lighting at night.
Remember, many factors can contribute to sleep health issues:
- Certain medications, such as those used for high blood pressure and asthma
- Chronic pain disorders and other conditions that cause persistent discomfort
- Stress in your personal or work life and conditions like anxiety or depression
Each individual has a slight variance in sleep need. Likewise, the duration of sleep needed does change depending on life stage. However, it is important to know everyone needs about eight hours of nightly sleep to maintain mental and physical health.
Medical Research on Sleep
With the answers to key questions on “why do we sleep?” coming into view, sleep researchers are continuing to pursue clinical sleep studies looking for new sleep disorder treatments.
Sleep clinical care has undergone revolutionary changes in recent years thanks to imaging technology that precisely pinpoints sleep-related changes in the human brain at any age.
Current Clinical Trials on Sleep
This list includes all clinical trials on sleep recognized by ClinicalTrials.gov. To add sleep clinical trials to our list, contact us.
- Effect of Adapted Physical Activity on Sleep Quality in People With Alcohol Use Disorderon February 12, 2026 at 5:00 am
Conditions: Alcohol Use Disorder Interventions: Behavioral: APA managed by qualified instructor; Behavioral: Autonomous APA Sponsors: Centre Hospitalier Universitaire de Besancon Recruiting
- Role of Slow Waves in the Progression of Neurodegeneration in Isolated REM Sleep Behavior Disorderon February 12, 2026 at 5:00 am
Conditions: Parkinson Disease; REM Sleep Behavior Disorder (iRBD) Interventions: Device: Tosoo Axora; Device: Tosoo Axora Sponsors: University of Zurich; University Hospital, Zürich Recruiting
- Brief Behavioral Sleep Intervention for Obesity Prevention in Primary Careon February 12, 2026 at 5:00 am
Conditions: Obesity, Childhood; Short Sleep; Obesity Prevention Interventions: Behavioral: Optimize Sleep Primary Care (OSPC); Other: Enhanced Usual Care Sponsors: Temple University; National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) Recruiting
- A Study to Evaluate the Safety and Effectiveness of ALKS 2680 in Subjects With Idiopathic Hypersomniaon February 12, 2026 at 5:00 am
Conditions: Idiopathic Hypersomnia Interventions: Drug: ALKS 2680; Drug: Placebo Sponsors: Alkermes, Inc. Recruiting
- Maridebart Cafraglutide Versus Placebo in Adult Participants With Obstructive Sleep Apnea Not on Positive Airway Pressure (PAP) Therapyon February 12, 2026 at 5:00 am
Conditions: Obstructive Sleep Apnea Interventions: Drug: Maridebart cafraglutide; Drug: Placebo Sponsors: Amgen Recruiting
- Better Outcomes Through Optimal Sleep in Surgical Trainingon February 12, 2026 at 5:00 am
Conditions: Staff Interventions: Behavioral: Sleep intervention Sponsors: Sheffield Teaching Hospitals NHS Foundation Trust Recruiting
- Sleep and Circadian Rhythm Biomarkers of Postoperative Deliriumon February 11, 2026 at 5:00 am
Conditions: Delirium, Postoperative; Cognitive Decline; Dementia Sponsors: Massachusetts General Hospital Recruiting
- Mindfulness-Based Intervention for Pain and Sleep in Adolescents and Young Adults With Sickle Cell Diseaseon February 11, 2026 at 5:00 am
Conditions: Chronic Pain; Sickle Cell Disease; Sleep Disturbance Interventions: Behavioral: Mobile bindfulness-based intervention Sponsors: University of Illinois at Chicago; National Institute of Nursing Research (NINR) Recruiting
- Colonic Tissue Biopsy Detection of Phosphorylated Alpha-synuclein for Parkinson's Diagnosis or REM Sleep Behavior Disorderon February 11, 2026 at 5:00 am
Conditions: PARKINSON DISEASE (Disorder); Parkinson; Parkinson s Disease; Parkinson Disease Sponsors: CND Life Sciences Recruiting
- Sleep and Morning Wellbeing Studyon February 11, 2026 at 5:00 am
Conditions: Sleep; Relaxation; Stress; Daytime Sleepiness Interventions: Dietary Supplement: Sleep Supplement Sponsors: Athletic Greens International Recruiting
- Prevalence of Obstructive Sleep Apnea in Patients With Peripheral Arterial Occlusive Diseaseon February 11, 2026 at 5:00 am
Conditions: Peripheral Artery Disease Sponsors: Centre Hospitalier Intercommunal de Toulon La Seyne sur Mer Recruiting
- Transcutaneous Auricular Vagus Nerve Stimulation for Insomnia in Survivors of Childhood Acute Lymphoblastic Leukemiaon February 11, 2026 at 5:00 am
Conditions: Survivor of Childhood Cancer; Insomnia; Acute Lymphoblastic Leukemia (ALL) Interventions: Device: Soterix tVNS device; Device: Soterix tVNS device (sham programmed); Behavioral: Sleep Quality; Behavioral: Neurocognitive and mental health outcomes Sponsors: St. Jude Children's Research Hospital Recruiting
Why Are More Clinical Trials on Sleep Necessary?
There may be no single “cure for insomnia”, but clinical trials on sleep help doctors develop effective sleep disorder treatment protocols for the various situations where sleep is disturbed.
Ongoing sleep research continues to redefine what we know about each of these conditions. Insomnia treatments are just one of the new sleep clinical resources coming from this effort.
Conclusion
The majority of American adults experience sleep disturbances at some point in life. With that in mind, clinical trials on sleep truly affect everyone. Unfortunately, sleep disorders are under-diagnosed – and those who suffer often do not pursue treatment. Participating in clinical studies on sleep is one way to help ensure you, and others, will rest better.
Content Box
- https://www.sciencedaily.com/releases/2018/06/180605154114.htm
- https://www.sleephealthfoundation.org.au/pdfs/Insomnia.pdf
- https://www.hopkinsmedicine.org/health/wellness-and-prevention/the-future-of-sleep-studies
- https://www.sleepfoundation.org/insomnia/what-insomnia
- https://medlineplus.gov/sleepdisorders.html
- https://www.sleepfoundation.org/articles/sleep-hygiene