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. 2011 Jul 4;589(Pt 16):4065–4075. doi: 10.1113/jphysiol.2011.211326

Figure 1. Effect of vibration before, during and after hypertonic saline-induced muscle pain.

Figure 1

VAS recordings over time of a typical subject (left) and the mean data of successive vibration-evoked responses (±SEM; n = 7; grey: allodynia; unshaded: baseline muscle pain) are shown. Cutaneous vibration (200 Hz–200 μm) evoked a reproducible increase in muscle pain throughout the sustained level of background pain (VAS 4–6), as well as during the decay phase following cessation of hypertonic saline (HS) infusion. Vibration-evoked allodynia ebbed before the onset of subsequent vibration trains. Prior to the initiation and on termination of HS-induced muscle pain, vibration was reported as non-painful (VAS = 0).