الفهرس 
Pathophysiology of PainOnly 14 pages are availabe for public view
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Abstract
Pain is defined as an unpleasant sensory and emotional experience resulting from, or described in terms of, true or potential tissue injury. Pain sets in motion mechanisms in the body that result in incapacity and adverse bio psychosocial effects (1).The intensity and expression of pain vary considerably between subjects, It is also affected by environmental, racial, religious, cultural, and philosophical factors, and by past experience and the mental state.