The central nervous system regulates the peripheral immune cells via acetylcholine-mediated efferent signals carried through the vagus nerve in response to an immune challenge. 機體在遭受免疫刺激時(shí),中樞通過(guò)傳出迷走神經(jīng)及其遞質(zhì)乙酰膽堿,將免疫調節信息傳遞給外周免疫細胞,抑制促炎因子釋放,保護機體免受傷害。