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. 2019 Feb 12;10:53. doi: 10.3389/fneur.2019.00053

Figure 1.

Figure 1

Direct and axon reflex mediated sweating in sudomotor nerve fibers. While direct sweating occurs in the akin area of iontophoretic application of acetylcholine, indirect sweating is evoked by an axon reflex in adjacent sweat glands. The axon reflex response can be assessed to study functional integrity of the sympathetic C fiber which mediates the reflex.