Mental Process
mental fatigue
men·tal fa·tigue
Subclass of:
Behavioral Symptoms; Fatigue
Definitions related to mental fatigue:
  • (brain fog) Brain fog is a type of transient cognitive dysfunction that comprises a constellation of symptoms that impair intellectual functioning to a level that interferes with daily activities, commonly including forgetfulness, mental slowness, difficulty thinking or focusing, a perceived slowing of mental processing speed, inability to find the right words, a sensation that the mind went blank or is cloudy". Brain fog tends to recur and may be triggered by factors such as physical fatigue, lack of sleep, and prolonged standing or may appear to occur spontaneously." [PMID:23999934, PMID:30452327, PMID:32857796, PMID:32984564, PMID:33199820]
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
  • A condition of low alertness or cognitive impairment, usually associated with prolonged mental activities or stress.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
Try this search on: Farlex, Merriam-Webster, Oxford Dictionary, or Wordnik

This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.