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Cerebral blood vessels were visualized by i.v. FITC-Dextran administration in CX3CR1tdTomato mice, and microglial process dynamics was investigated by in vivo two-photon microscopy along the vascular tree. Refer to Fig. 1, a and b for further details. Fig. 1 b depicts blood vessels identical to those shown in the video file, with arrowheads indicating the contact surfaces between microglial processes and first- or second-order capillaries.
