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Neurasthenia (from the Ancient Greek νεῦρον neuron "nerve" and ἀσθενής asthenés "weak") is a term that was first used as early as 1829 [6] for a mechanical weakness of the nerves. [clarification needed] It became a major diagnosis in North America during the late nineteenth and early twentieth centuries after neurologist George ...
Mental fatigue is a temporary inability to maintain optimal cognitive performance. The onset of mental fatigue during any cognitive activity is gradual, and depends upon an individual's cognitive ability, and also upon other factors, such as sleep deprivation and overall health.
Psychological stress. In psychology, stress is a feeling of emotional strain and pressure. [1] Stress is a form of psychological discomfort and mental discomfort. Small amounts of stress may be beneficial, as it can improve athletic performance, motivation and reaction to the environment. Excessive amounts of stress, however, can increase the ...
Pain, anxiety, depression. In medicine, malaise is a feeling of general discomfort, uneasiness or lack of wellbeing and often the first sign of an infection or other disease. [1] The word has existed in French since at least the 12th century. The term is often used figuratively in other contexts, in addition to its meaning as a general state of ...
Emotions. v. t. e. Depression is a mental state of low mood and aversion to activity. [3] It affects about 3.5% of the global population, or about 280 million people of all ages (as of 2020). [4] Depression affects a person's thoughts, behavior, feelings, and sense of well-being. [5]
Ego depletion. Ego depletion is the idea that self-control or willpower draws upon conscious mental resources that can be taxed to exhaustion when in constant use with no reprieve (with the word "ego" used in the psychoanalytic sense rather than the colloquial sense). [1] When the energy for mental activity is low, self-control is typically ...
Mental disorders. Mental health, as defined by the Public Health Agency of Canada, [6] is an individual's capacity to feel, think, and act in ways to achieve a better quality of life while respecting personal, social, and cultural boundaries. [7] Impairment of any of these are risk factor for mental disorders, or mental illnesses, [8] which are ...
A mental disorder, also referred to as a mental illness, [6] a mental health condition, [7] or a psychiatric disability, [2] is a behavioral or mental pattern that causes significant distress or impairment of personal functioning. [8] A mental disorder is also characterized by a clinically significant disturbance in an individual's cognition ...