This article provides an integrated review of the basic anatomy and physiology of the pain processing pathways. The transmission and parcellation of noxious stimuli from the peripheral nervous system to the central nervous system is discussed. In addition, the inhibitory and excitatory systems that regulate pain along with the consequences of dysfunction are considered.
Keywords: Allodynia; Descending systems; Gait control theory; Hyperalgesia; Peripheral sensitization; Spino-thalamic tract.
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