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Table 1 Experimental pain models eligible as interventions

From: Neuromuscular adaptations to experimentally induced pain in the lumbar region: protocol for a systematic review and meta-analysis

Injection/topical application of algesic substances
■ Hypertonic saline
■ Capsaicin
■ Glutamate
■ Acidic buffers
■ Miscellaneous (e.g. serotonin, bradykinin, histamine)
■ Nerve growth factor
Thermal stimulation
■ Cold
■ Contact heat
■ Laser
Electrical nociceptive stimulation