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