Substance P. Neuropeptide; neurotransmittor and -modulator. Composed of a chain of 11 amino acid residues. Substance P is released from the terminals of specific sensory nerves. It is found in the brain and spinal cord and is associated with inflammatory processes and pain.
Your brain on LSD probably isn't the disaster Nancy Reagan wanted you to believe it would be. Can this drug which is currently illegal in the U., actually provides some mental health benefits? Learn more about the efficacy of LSD from this infographic.
How much does it hurt? Aching, throbbing, searing, excruciating – pain is difficult to describe and impossible to see. So how can doctors measure it? John Walsh finds out about new ways of assessing the agony.