Memorial Day Offer

Discover your mystery discount!


Causes of Somnolence: – Circadian rhythm disorders – Advanced sleep phase disorder (ASPD) – Delayed sleep phase disorder (DSPD) – Non-24-hour sleep-wake disorder – Irregular […]

« Back to Glossary Index

Causes of Somnolence:
– Circadian rhythm disorders
– Advanced sleep phase disorder (ASPD)
– Delayed sleep phase disorder (DSPD)
– Non-24-hour sleep-wake disorder
– Irregular sleep-wake rhythm
– Physical illness
– Infection response
– Medications like anticonvulsants, antipsychotics, and HIV medications
– Hypnotics, tranquilizers, and other CNS impacting agents
– Sleep disorders
– Mental health conditions
– Chronic medical conditions
– Substance abuse

Assessment and Diagnosis of Somnolence:
– Quantifying sleepiness
– Chronicity and reversibility factors
– Objective measures like Multiple Sleep Latency Test (MSLT)
– Pathological sleepiness indication
– Diagnostic tools like Epworth Sleepiness Scale
– Medical history evaluation
– Physical examination
– Sleep study
– Blood tests
– Imaging tests

Severity and Dangers of Somnolence:
– Diagnostic tests availability
– Importance of diagnosing abnormal somnolence
– Research on alert/nonalert transitions
– Impact of abnormal somnolence on visual thalamocortical network dynamics
– Sources for understanding drowsiness and its treatments
– Sleepiness risks in tasks like driving
– Microsleeps phenomenon
– Spontaneous dissipation of somnolence in sleep-deprived individuals
– Second wind phenomenon
– Circadian rhythm interference with rest preparation processes

Derivation and Classification of Somnolence:
– Somnolence definition and symptoms
– Somnolence as a symptom, not a disorder
– Various disorders associated with somnolence
– Medical codes for somnolence disorders (ICD-10: R40.0, ICD-9-CM: 780.09)
– Origin of the word somnolence from Latin ‘somnus’

Treatment of Somnolence:
– Address underlying cause
– Medications
– Behavioral therapy
– Lifestyle changes
– Continuous positive airway pressure therapy

Somnolence (Wikipedia)

Somnolence (alternatively sleepiness or drowsiness) is a state of strong desire for sleep, or sleeping for unusually long periods (compare hypersomnia). It has distinct meanings and causes. It can refer to the usual state preceding falling asleep, the condition of being in a drowsy state due to circadian rhythm disorders, or a symptom of other health problems. It can be accompanied by lethargy, weakness and lack of mental agility.

Other namesSleepiness, drowsiness

Somnolence is often viewed as a symptom rather than a disorder by itself. However, the concept of somnolence recurring at certain times for certain reasons constitutes various disorders, such as excessive daytime sleepiness, shift work sleep disorder, and others; and there are medical codes for somnolence as viewed as a disorder.

Sleepiness can be dangerous when performing tasks that require constant concentration, such as driving a vehicle. When a person is sufficiently fatigued, microsleeps may be experienced. In individuals deprived of sleep, somnolence may spontaneously dissipate for short periods of time; this phenomenon is the second wind, and results from the normal cycling of the circadian rhythm interfering with the processes the body carries out to prepare itself to rest.

The word "somnolence" is derived from the Latin "somnus" meaning "sleep".

« Back to Glossary Index
This site uses cookies to offer you a better browsing experience. By browsing this website, you agree to our use of cookies.