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. 2022 Dec 19;3:1041905. doi: 10.3389/fpain.2022.1041905

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© 2022 Volk, Döhler, Klingner, Weiss and Guntinas-Lichius.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Left: Investigation of the mechanical detection threshold (MDT) at a standard spot on the face using von Frey hairs. Right: Investigation of the pressure pain threshold (PPT) using a pressure algometer on the face.