Fig. 3
From: Regional cerebral blood flow as predictor of response to occipital nerve block in cluster headache
Differences in rCBF between the responders and the non-responders groups of CH patients at baseline (left panel) and following GONB (right panel). Increased local perfusion in responders (green) is observed in the LOC both prior and after GONB, being extended in the post GONB session. Increased local perfusion in non-responders comprised the PCC and the PMC in both sessions. Lower panel shows increased activation in mPFC for the responders group after performing small volume correction (SVC). Data included four CBF maps per patient and session. All clusters are significant at p < 0.05 (FWE corrected; initial height threshold set to 0.001). GONB = greater occipital nerve block; R = right; L = left