The unintentional release of urine or faeces may occur in conditions of fear, shock or distress and is therefore a very complex mechanism, and totally out of voluntary control. When we find ourselves before a sudden and imminent danger or a high state of anxiety due to external factors or internal (mental), our body instinctively triggers a defense system defined type "fight or flight": that you turn on all systems that predispose to attack or escape. The sympathetic nervous system controls and this mechanism is activated, releasing large amounts of adrenaline in the blood to have faster reflexes. Then accelerate the beat heart resulting in increased blood pressure, increases vasoconstriction (narrowing of blood vessels) in device that can lead to facial pallor and dilated pupils and bronchi for easy viewing oxygenation. At the same time, all the body's energy is diverted from the digestive tract and both the anal sphincter, which is the ring of muscle that surrounds and controls the opening of the anus, and the urinary sphincter, which controls the bladder are clamped down ' moment. And just this last step, uncontrollable and often uncoordinated, which may involve the involuntary leakage of small amounts of fluids and faeces, especially those stationed in the bulb anal, last part of the digestive tract.
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