有些家长逢小儿咳嗽,不经医生检查就给孩子服止咳药,这种做法是不对的。咳嗽是由于呼吸道分泌物或异物刺激呼吸道感受器和感觉神经末梢后,刺激信号传到延脑的咳嗽中枢,再由中枢将反应信号通过传出神经下达到反应器而形成的咳嗽动作,能促使呼吸道的分泌物或 Some parents coughing in children, cough medicine to their children without a doctor to check, this approach is wrong. Cough is due to respiratory secretions or foreign body to stimulate the airway sensory receptors and sensory nerve endings, the stimulus signal spread to the brain center of the brain, and then by the central reaction signal through the outgoing nerve to the reactor and the formation of cough, can promote the respiratory tract The secretions or