Activation of signal molecules following HBO exposure in rat spinal neurons. The activation of signal molecules related to HSP32 induction were detected using Bio-Plex Phosphoprotein Detection kit. Significance compared with Air group, *p<0.05, **p<0.01. CREB, cAMP-response element binding protein; ERK1/2, extracellular signal-regulated kinase 1/2; p38 MAPK, p38 mitogen-activated protein kinase.