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.
- Developing Restful Environments and Management Strategies for Pediatric Stem Cell Transplant Patientson July 15, 2025 at 4:00 am
Conditions: Stem Cell Transplant Complications; Sleep Disturbance Interventions: Behavioral: DREAMS Program Video and Care Kit Sponsors: Dana-Farber Cancer Institute; American Cancer Society, Inc. Recruiting
- Light Therapy for Obsessive-compulsive Disorder (OCD)on July 15, 2025 at 4:00 am
Conditions: OCD Interventions: Behavioral: Light therapy Sponsors: Washington University School of Medicine Recruiting
- Safety and Efficacy Study of YZJ-1139 Tablets in Insomnia Disorderon July 15, 2025 at 4:00 am
Conditions: Insomnia Disorder Interventions: Drug: YZJ-1139; Drug: Zolpidem Sponsors: Shanghai Haiyan Pharmaceutical Technology Co., Ltd. Recruiting
- StandUPTV Habits: Feasibility Trial for Maintaining Reductions in Sedentary Screen Timeon July 15, 2025 at 4:00 am
Conditions: Sedentary Behaviors; Screen Time; Physical Activity; Glucose Metabolism; Sleep Quality; HbA1c Level Interventions: Behavioral: Non-Sedentary Behavior Habit Formation; Behavioral: Sedentary Screen Time Reduction Smartphone App Sponsors: Arizona State University; California Polytechnic State University-San Luis Obispo; National Institutes of Health (NIH); National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) Recruiting
- UrbanHEAT: Health Behaviors, Outcomes, and Disparities in Individually Experienced Temperature Across an Urban Communityon July 15, 2025 at 4:00 am
Conditions: Temperature Sponsors: National Institute on Minority Health and Health Disparities (NIMHD); National Institute of Nursing Research (NINR) Recruiting
- Acetazolamide in Central Sleep Apnea Patients Using Medication for Opioid Use Disorderon July 15, 2025 at 4:00 am
Conditions: Central Sleep Apnea Comorbid With Opioid Use Interventions: Drug: Acetazolamide; Drug: Placebo Sponsors: Sanjay R Patel; National Institute on Drug Abuse (NIDA) Recruiting
- Decreasing Nightmares in Adults With Narcolepsyon July 15, 2025 at 4:00 am
Conditions: Narcolepsy; Narcolepsy Type 1; Narcolepsy With Cataplexy; Narcolepsy Without Cataplexy; Nightmare; Nightmare Disorder With Associated Other Sleep Disorder Interventions: Behavioral: Imagery Rehearsal Therapy (IRT) Sponsors: University of Utah Recruiting
- Assessment of Circuit Rebreathing During CPAP Therapyon July 14, 2025 at 4:00 am
Conditions: Obstructive Sleep Apnea (OSA) Interventions: Device: Continuous positive airway pressure (CPAP); Other: Mask exhaust port flow Sponsors: Brigham and Women's Hospital; Sleep Res, Inc. Recruiting
- Project SHINE (Sleep Health INitiative for Equity): Culturally Informing a Sleep Extension Intervention for African American Adultson July 14, 2025 at 4:00 am
Conditions: Obesity; Insufficient Sleep Interventions: Behavioral: sleep extension intervention; Behavioral: contact control intervention Sponsors: University of Minnesota Recruiting
- Low Sodium Oxybate in Patients With Idiopathic Hypersomniaon July 14, 2025 at 4:00 am
Conditions: Idiopathic Hypersomnia Interventions: Drug: Low Sodium Oxybate; Diagnostic Test: 24-hour polysomnography; Device: Nextsense EEG earbuds; Device: Axivity device Sponsors: Mayo Clinic Recruiting
- Studying Childhood-onset Behavioral, Psychiatric, and Developmental Disorderson July 14, 2025 at 4:00 am
Conditions: Neuropsychiatric Disorder; Neurological Disorder; Neurodevelopmental Disorder; Sleep Sponsors: National Institute of Mental Health (NIMH) Recruiting
- Chronic Insomnia in Non-Cancer Pain Patientson July 14, 2025 at 4:00 am
Conditions: Chronic Non-cancer Pain; Insomnia Interventions: Other: Usual care provided from pain specialist or within a dedicated pain unit Sponsors: Germans Trias i Pujol Hospital; Societat Catalana de Dolor (Catalan Society for Pain); Hospital del Mar 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