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. Author manuscript; available in PMC: 2010 Mar 15.
Published in final edited form as: Auton Neurosci. 2007 Feb 1;133(2):153–157. doi: 10.1016/j.autneu.2006.12.002

Figure 1.

Figure 1

Vasodilatation in response to parasympathetic stimulation. Electrical stimulation of the PPG with intact ganglionic fibers (left) elicited increased CBF as did direct electrical stimulation of ganglionic fibers (center). In contrast, electrical stimulation of the PPG after transection of ganglionic fibers (right) did not affect CBF. Note that the latter recording was made at a slower speed and with repeated stimuli to better demonstrate that CBF changes did not occur late after any stimulus.