Electric shock is a common stimulus for nociception-research and the most widely used reinforcement in aversive associative learning experiments. Yet, nothing is known about the mechanisms it recruits
N.S., no significance. The significance of boldface is a P-value of ‡Number of allele.§Unadjusted P-value of two-sided χ2 test.∥P value after 1,000-permutation tests.
