Figure 1.

Intradermal injection enhanced Evans blue diffusion into the brain. (A) In-vivo images of the mouse head after intranasal, intravenous and intradermal injection of Evans blue. (B) Images of the whole brains and the corresponding slices from intravenous, intranasal and intradermal injection of Evans blue. (C) Images of right and left trigeminal nerves with i.d., i.n. and i.v. of Evans blue injection. ns: normal; i.v.: intravenous injection via tail vein; i.n.: intranasal injection; i.d.: intradermal injection in the mystacial pad.