The parasympathetic system is responsible for the body’s digestive and recuperative processes. Usually these two systems sustain a general balance between their demands upon the body’s resources, but during extremely stressful circumstances the fight-or-flight response kicks in and the sympathetic nervous system mobilizes all available energy for survival. In combat this very often results in nonessential activities such as digestion, bladder control, and sphincter control being completely shut down. This process is so intense that soldiers very often suffer stress diarrhea, and it is not at
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