im too curious abt this. congrats 4 bringing up this post , hope many answers , ill do some effort to get an answer .
since the heart is located in most people on the left side of chest due to which reffered pain occurs in the left arm unless they have "situs inversus" where it would be pointing to the right side of chest. The aorta (the major blood vessel arising from heart) divides into subclavian arteries and carotid arteries which supply head and arms. Nerve connections run alongside arteries therefore if you develop angina pectoris in heart, your arteries will also develop pain. Referred pain from angina can also be present in right arm(brachial artery) and/or neck(carotids). few other examples of referred pain are gall bladder pain - left shoulder pain.
hope im right mightchillout, lets see what other members say .
i wish if in case my point is wrong kindly correct me .
Referred pain is an sensation felt in an area separate from the site of the causative injury or other painful stimulation. Often, referred pain arises when a nerve is compressed or damaged at or near its origin. In this circumstance, the sensation of pain will mostly be felt in the territory that the nerve serves, even though the damage originates elsewhere.
thanks a lot pearly sun....but i'm not the one to authorise dis.....
but i have another confusion....................pain shud only be there if the nerve is injured at its ORIGIN......so how does pain refer to other part while the origin aint damaged>???
im trying to find out an answer until then we'll wait for other members to answer else we'll somehow figure out .
ok..i got sumthin.........
,,,,...Nerve fibres from the diseased organ/sructure ascend to a specific area in the CNS....this is along a common pathway...hence the cerebral cortex is incapable of distinguishing between the sites..leading to a sensation of pain in the dermatome distribution......