text: Recent research has suggested that oxidative damage (e.g. by free radicals) may play a role in the pathophysiology of complex regional<unk><unk> . The sympathetic nervous system may also play an important role in the<unk>  aspect of the condition. Another theory is that CRPS is caused by a triggering of the immune response.
option_0: Complex regional pain syndrome pathophysiology
option_1: Complex regional pain syndrome risk factors
option_2: Back pain pathophysiology
option_3: Polymyalgia rheumatica pathophysiology
option_4: Morton's neuroma pathophysiology
option_5: Complex regional pain syndrome epidemiology and demographics
option_6: Carpal tunnel syndrome pathophysiology
option_7: Spinal cord compression pathophysiology