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Another definition is that fatigue is "a significant subjective sensation of weariness, increasing sense of effort, mismatch between effort expended and actual performance, or exhaustion independent from medications, chronic pain, physical deconditioning, anaemia, respiratory dysfunction, depression, and sleep disorders". [14]
Muscle fatigue is when muscles that were initially generating a normal amount of force, then experience a declining ability to generate force.It can be a result of vigorous exercise, but abnormal fatigue may be caused by barriers to or interference with the different stages of muscle contraction.
Comparative anatomy – Study of similarities and differences in the anatomy of different species; Comparative physiology – Study of the diversity of functional characteristics of organisms. Development of the human body – Process of human growth to maturity; Glossary of medicine; Human physical appearance – Look, outward phenotype
Gross anatomy has become a key part of visual arts. Basic concepts of how muscles and bones function and deform with movement is key to drawing, painting or animating a human figure. Many books such as Human Anatomy for Artists: The Elements of Form, are written as a guide to drawing the human body anatomically correctly. [4]
Central nervous system fatigue, or central fatigue, is a form of fatigue that is associated with changes in the synaptic concentration of neurotransmitters within the central nervous system (CNS; including the brain and spinal cord) which affects exercise performance and muscle function and cannot be explained by peripheral factors that affect muscle function.
They argued that the definition of burnout should be limited to fatigue and exhaustion. [3] In 2006, Shirom and Melamed with their Shirom-Melamed Burnout Measure (SMBM) conceptualized burnout in terms of physical exhaustion, cognitive weariness, and emotional exhaustion.
The condition was explained as being a result of exhaustion of the central nervous system's energy reserves, which Beard attributed to modern civilization. Physicians in the Beard school of thought associated neurasthenia with the stresses of urbanization and with stress suffered as a result of the increasingly competitive business environment.
[22] [23] [19] ICF consists of the single symptom of fatigue, which may be either mental or physical or both, and may be described in many different ways including as "exhaustion". [ 6 ] ICF has no known cause, and psychological factors such as stress have been ruled out, but neurasthenia was believed to be caused by the stresses of the modern ...