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Lethargy is a state of tiredness, sleepiness, weariness, fatigue, sluggishness, or lack of energy. It can be accompanied by depression , decreased motivation, or apathy . Lethargy can be a normal response to inadequate sleep, overexertion, overworking, stress, lack of exercise, improper nutrition, drug abuse, boredom , or a symptom of an ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 1 March 2025. Long-term brain disorders causing impaired memory, thinking and behavior This article is about the cognitive disorder. For other uses, see Dementia (disambiguation). "Senile" and "Demented" redirect here. For other uses, see Senile (disambiguation) and Demented (disambiguation). Medical ...
Fatigue in a medical context is used to cover experiences of low energy that are not caused by normal life. [2] [3]A 2021 review proposed a definition for fatigue as a starting point for discussion: "A multi-dimensional phenomenon in which the biophysiological, cognitive, motivational and emotional state of the body is affected resulting in significant impairment of the individual's ability to ...
Cognitive disengagement syndrome (CDS) is a syndrome characterized by developmentally inappropriate, impairing, and persistent levels of decoupled attentional processing from the ongoing external context and resultant hypoactivity.
One potentially life-threatening example is meningitis, which can cause chills with or without a fever, along with symptoms like a stiff neck, sensitivity to light and sound, and lethargy.
Specific manifestations vary by age and by the severity of the hypoglycemia. In older children and adults, moderately severe hypoglycemia can resemble mania, mental illness, drug intoxication, or drunkenness. In the elderly, hypoglycemia can produce focal stroke-like effects or a hard-to-define malaise.
In the brain, serotonin is a neurotransmitter and regulates arousal, behavior, sleep, and mood, among other things. [9] During prolonged exercise where central nervous system fatigue is present, serotonin levels in the brain are higher than normal physiological conditions; these higher levels can increase perceptions of effort and peripheral muscle fatigue. [9]
Geriatrics, or geriatric medicine, [1] is a medical specialty focused on addressing the unique health needs of older adults [2] The term geriatrics originates from the Greek γέρων geron meaning "old man", and ιατρός iatros meaning "healer".