Laser-evoked potentials in painful radiculopathy

Painful radiculopathy is induced by pathology of the nerve root or its ganglion and is perceived along the length of the lower limb most frequently in the L5/S1 dermatomal distribution. The current pathophysiological concepts of dorsal root damage differentiate between biochemical and mechanical processes. Mechanical compression can lead to fibrosis and total functional loss of the affected nerve fibers, which is often accompanied by a reduced number of axons. The compression might reduce neuronal impulse synchronization or induce a complete conduction block (Yoshii et al., 2010).

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