I have a question to people who are well acquainted with nociception in the worm. Does anyone know about stress-induced analgesia in C. elegans? My search did not turn up anything useful.
not really a member of the well aquainted group you speak of, but I suppose thermal avoidance has been posited as a model of noiception in the worm:
This, taken together with research showing that opiate receptors might be important in regulation of the thermal avoidance response:
provides a starting point. The question of whether worms (can perhaps) show stress-induced adaption to noiceptive cues such as extreme temperatures is alluded to in the Baumeister paper above.