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A somnolent person shows excessive drowsiness and responds to stimuli only with incoherent mumbles or disorganized movements. [8] Obtunded: Decreased alertness; slowed psychomotor responses In obtundation, a person has a decreased interest in their surroundings, slowed responses, and sleepiness. [9] Stuporous
Polysomnography (PSG) is a multi-parameter type of sleep study [1] and a diagnostic tool in sleep medicine.The test result is called a polysomnogram, also abbreviated PSG.The name is derived from Greek and Latin roots: the Greek πολύς (polus for "many, much", indicating many channels), the Latin somnus ("sleep"), and the Greek γράφειν (graphein, "to write").
The problem with the assessment is that patients may only report the consequences of sleepiness: loss of energy, fatigue, weariness, difficulty remembering or concentrating, etc. It is crucial to aim for objective measures to quantify the sleepiness. A good measurement tool is the multiple sleep latency test (MSLT).
NREM Stage 1 (N1 – light sleep, somnolence, drowsy sleep – 5–10% of total sleep in adults): This is a stage of sleep that usually occurs between sleep and wakefulness, and sometimes occurs between periods of deeper sleep and periods of REM. The muscles are active, and the eyes roll slowly, opening and closing moderately.
Fatigue is a state of tiredness (which is not sleepiness), exhaustion [1] or loss of energy. [2] [3]Fatigue (in the medical sense) is sometimes associated with medical conditions including autoimmune disease, organ failure, chronic pain conditions, mood disorders, heart disease, infectious diseases, and post-infectious-disease states. [4]
The sopite syndrome (/ s oʊ ˈ p aɪ t /; from Latin sopire 'to put to sleep') [1] is a neurological disorder that relates symptoms of fatigue, drowsiness, and mood changes to prolonged periods of motion. [2] The sopite syndrome has been attributed to motion-induced drowsiness such as that experienced by a baby when rocked. [1]
Once one catches up on sleep, one's mood will often return to baseline or normal. Even partial sleep deprivation can have a significant impact on mood. In one study, subjects reported increased sleepiness, fatigue, confusion, tension, and total mood disturbance, which all recovered to their baseline after one to two full nights of sleep. [56] [57]
The 'maintenance of wakefulness test' (MWT) is a test that measures the ability to stay awake. [45] It is used to diagnose disorders of excessive somnolence, such as hypersomnia, narcolepsy or obstructive sleep apnea. [45] [46] During that test, patients sit comfortably and are instructed to try to stay awake. [45]