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As the afferent (sensory) fibers from the skin of the chest (intercostal nerves T1-4) and medial sides of arm (intercostobrachial nerve T2) enter the same DRG as the sensory fibers from the heart, the pain is perceived to be coming from those regions.
Dr. S. Chandra
Chest and arm
Dr. S. Chandra, Faculty of Medicine, Memorial University of Newfoundland
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