Fig. 4
From: Regional cerebral blood flow as predictor of response to occipital nerve block in cluster headache
Local increases (red) and decreases (blue) in CBF across all CH prior to GONB in comparison to healthy controls. Brain areas in red include cerebellum and hippocampus. Clusters in blue colour corresponds to OFC, primary auditory cortex, insula and MTG. For these contrasts, data included one CBF map per patient and healthy individual. All clusters are significant at p < 0.05 (FWE corrected; initial height threshold set to 0.001)