This refers to the feeling of pain arising from normal visceral sensations.  For instance, if a patient has abnormal visceral nociception ordinary distension of viscera even may be perceived as pain.  Abnormal visceral nociception is believed to be the underlying reason for several common clinical states seen in primary care – recurrent anterior chest wall pain, IBS, heartburn, and dyspepsia.  It is believed that in abnormal visceral perception, the lesion may lie in any 1 or all of the following – gut lumen receptors, afferent neuron – excessive afferent neuronal impulse propagation, abnormal signal processing at the spinal cord, abnormal relay of signals to the cortex, efferent neuron – abnormal activation of the efferent limb of the sympathetic nervous system.