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Visceral pain is pain that results from the activation of nociceptors of the thoracic, pelvic, or abdominal viscera (organs). Visceral structures are highly sensitive to distension (stretch), ischemia and inflammation , but relatively insensitive to other stimuli that normally evoke pain such as cutting or burning.
In the abdomen, general visceral afferent fibers usually accompany sympathetic efferent fibers. This means that a signal traveling in an afferent fiber will begin at sensory receptors in the afferent fiber's target organ, travel up to the ganglion where the sympathetic efferent fiber synapses, continue back along a splanchnic nerve from the ganglion into the sympathetic trunk, move into a ...
Chronic visceral pain from vascular mechanisms is caused by changes in the arterial or venous blood vessels that supply blood to the viscera of the thoracic, abdominal, and pelvic cavities and the head or neck region. It can also be caused by a disorder of the vascular system that causes pain in other areas of the body.
In the thoracic cavity, the heart is a hollow, muscular organ. [7] Splanchnology is the study of the viscera. [8] The term "visceral" is contrasted with the term "parietal", meaning "of or relating to the wall of a body part, organ or cavity". [9]
Each of the thoracic, and the first and second lumbar nerves contribute a white ramus communicans to the adjoining sympathetic ganglion, unlike the gray rami which are located at each spinal level. [1] White rami communicantes contain both myelinated and unmyelinated preganglionic sympathetic fibers, (GVE and GVA). The white ramus appears white ...
It is an area that is insensitive to pain due to its association with the lung and innervation by visceral sensory neurons. [8] Visceral pleura also forms interlobular septa (that separates secondary pulmonary lobules). [9] Interlobular septa contains connective tissue, pulmonary veins, and lymphatics. [10]
The thoracic cavity (or chest cavity) is the chamber of the body of vertebrates that is protected by the thoracic wall (rib cage and associated skin, muscle, and fascia). The central compartment of the thoracic cavity is the mediastinum .
Thoracic splanchnic nerves are splanchnic nerves that arise from the sympathetic trunk in the thorax and travel inferiorly to provide sympathetic supply to the abdomen. The nerves contain preganglionic sympathetic fibers and general visceral afferent fibers.