From: Phosphorylation of ERK in neurokinin 1 receptor-expressing neurons in laminae III and IV of the rat spinal dorsal horn following noxious stimulation
Stimulus
Number of lamina III/IV NK1r-immunoreactive cells examined
Number positive for pERK
Number with somatic pERK
pinch (n = 4)
32
31 (97%)
26 (81%)
heat (n = 3)
28
28 (100%)
25 (89%)
formaldehyde (n = 3)
34
33 (97%)
21 (62%)