Definitions for epiphenomenal. Here are all the possible meanings and translations of the word epiphenomenal. Wiktionary(0.00 / 0 votes)Rate this definition: epiphenomenal(Adjective) Being of secondary consequence to a causal chain of processes, but playing no causal role in the process of interest. epiphenomenal(Adjective) Of or pertaining to a mental process which occurs only as an incidental effect of electrical or chemical activity in the brain or nervous system.
1 Stress: Stress can exacerbate digestive system disorders, which lead to pain on the right side of the chest. 2  Some key stressors are work, school or family and relationship problems. 3  Muscle Pulls: Pulls of the muscles or ligaments in the chest and injuries to the ribcage may lead to right side chest pain.
1 Liver Inflammation and Hepatitis: Inflammation of the liver can cause âpopping' in the chest, as well as pain in the right shoulder or pain in the right side of the rib cage and back. 2  Similarly, right side chest pain may be due to hepatitis, which is a disease that causes swelling and inflammation of the liver.