Anesthesiology · 2010 · 90 citations · 43 references
These findings suggest that the descending serotonergic pathways and spinal 5-HT7 receptors play a crucial role in the antinociceptive and antihyperalgesic effects of tramadol and M1.
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Ethical guidelines for investigations of experimental pain in conscious animals
M. Zimmermann · Pain · 1983 · 7.7K citations
A new and sensitive method for measuring thermal nociception in cutaneous hyperalgesia
Kenneth Hargreaves, Ronald Dubner, Frederick J. Brown et al. · Pain · 1988 · 5.1K citations