The mechanism of SDS was involved the C1 adrenergic neuron deficiency of brain-stem ventrolateral medulla.The supplement of function to the neurons was a way of therapy.

• 卧位休息时多能缓解，它的发生与脑干腹外侧核C1肾上腺素能神经元缺失相关，治疗可考虑补偿该类神经元功能。