Although ritanserin clearly reduced the responses to the lower von Frey and heat stimuli tested, these did not quite reach significance ( Fig. 2 b and c).
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A pronociceptive role for the 5-HT2 receptor on spinal nociceptive transmission: an in vivo electrophysiological study in the rat.
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The sentences
A trend towards a facilitation of the electrical C-fibre, post-discharge and input evoked neuronal responses was seen, but these effects did not reach statistical significance.