Arquivos de neuro-psiquiatria
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Clinical Trial
Greater occipital nerve blockade in cervicogenic headache.
Cervicocogenic headache (CeH) is a relatively common disorder. Although on ideal treatment is available so far, blockades in different structures and nerves may be temporarily effective. ⋯ The improvement is less marked during the first two days, a phenomenon we called "tilde pattern". GON blockades may reduce the pool of exaggerated sensory input and antagonize a putative "wind-up-like effect" which may explain the headache improvement.