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.
- Functional Magnetic Resonance Imaging Sleep Study With Auditory Stimulion May 13, 2025 at 4:00 am
Conditions: Normal Physiology Sponsors: National Institute of Neurological Disorders and Stroke (NINDS) Recruiting
- NE3107 in Adults With Neurological Symptoms of Long COVIDon May 13, 2025 at 4:00 am
Conditions: Long COVID Interventions: Drug: NE3107; Drug: Placebo Sponsors: BioVie Inc. Recruiting
- Non-invasive Nerve Stimulation and Sleepon May 13, 2025 at 4:00 am
Conditions: PTSD Interventions: Device: non-invasive nerve stimulation Sponsors: VA Office of Research and Development Recruiting
- Memory Training in Insomnia With Cognitive Impairmenton May 13, 2025 at 4:00 am
Conditions: Cognitive Therapy/Methods; Insomnia Chronic; Cognitive Dysfunction Interventions: Behavioral: Cognitive Remediation Therapy plus Sleep Hygiene Education (CRT+SHE); Behavioral: Sleep Hygiene Education Only (SHE) Sponsors: Xuanwu Hospital, Beijing Recruiting
- Effect of Behavioral Sleep Intervention on Lower Urinary Tract Symptoms in Older Womenon May 13, 2025 at 4:00 am
Conditions: Urgency Urinary Incontinence; Nocturia Interventions: Drug: Mirabegron 50 MG; Behavioral: Brief Behavioral Treatment for Insomnia Sponsors: Shachi Tyagi; National Institute on Aging (NIA) Recruiting
- UrbanHEAT: Health Behaviors, Outcomes, and Disparities in Individually Experienced Temperature Across an Urban Communityon May 13, 2025 at 4:00 am
Conditions: Temperature Sponsors: National Institute on Minority Health and Health Disparities (NIMHD); National Institute of Nursing Research (NINR) Recruiting
- Sleep Mechanisms Of Regulating Emotionson May 13, 2025 at 4:00 am
Conditions: Insomnia; Depression Interventions: Behavioral: Cognitive Behavioral Therapy for Insomnia Sponsors: Stanford University; National Institute of Mental Health (NIMH) Recruiting
- Double-blind Pilot Study on the Effect of Anionic Exposome Enrichment (Biow) on Recovery and Sleep Quality in Postoperative Patientson May 13, 2025 at 4:00 am
Conditions: Inflammatory Response After Surgery; Postoperative Recovery Interventions: Device: EOX Anion-Enriched Hospital Room Sponsors: Instituto de Investigación Sanitaria de la Fundación Jiménez Díaz Recruiting
- Effect of MIT for CI With Anxietyon May 13, 2025 at 4:00 am
Conditions: Chronic Insomnia; Anxiety Disorders Interventions: Behavioral: Mindfulness Intervention Therapy plus Sleep Hygiene Education; Behavioral: Sleep Hygiene Education Sponsors: Xuanwu Hospital, Beijing Recruiting
- Effect of WBT for CI With Depressionon May 13, 2025 at 4:00 am
Conditions: Chronic Insomnia; Depression Disorders Interventions: Behavioral: Well-Being Therapy; Behavioral: Sleep Hygiene Education Sponsors: Xuanwu Hospital, Beijing Recruiting
- The Effect of Cranial Electrotherapy Stimulation on the Cognition, Anxiety, Depression and Sleep Quality of Chronic Psychiatric Patientson May 13, 2025 at 4:00 am
Conditions: Sleep; Depression Disorders Interventions: Device: CES Sponsors: Liu Hsing Yu Recruiting
- Ba Duan Jin for CI With Hyperarousal/Anxietyon May 13, 2025 at 4:00 am
Conditions: Mind-Body Therapies; Insomnia Chronic Interventions: Behavioral: Ba Duan Jin Exercise plus Sleep Hygiene Education; Behavioral: Sleep Hygiene Education Sponsors: Xuanwu Hospital, Beijing 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