Fig. 3

The CBF and aCBV values of the bilateral amygdala between the HC and EM groups, EM and CM groups, as well as HC and CM groups. A, B Compared to HC group, the left amygdala presented significantly increased CBF and aCBV values in CM group (P = 0.013 and 0.018, respectively); C Compared to HC group, the right amygdala showed significantly increased CBF values in CM group (P = 0.015). CBF cerebral blood flow, aCBV Arterial cerebral blood volume, HC healthy control, EM episodic migraine, CM chronic migraine