老年人与年轻人相比,静息状态的交感神经紧张性增高,心迷走神经紧张性高于心交感神经;对体位变换、深呼吸、咽鼓管、充气、寒冷、运动等体内外环境条件改变的应答性反应降低;窦房结的β-肾上腺素能受体密度减小。心率变化功率谱可用于无创性植物神经功能检测;老年人仰卧时颈脉窦按摩诱发的停跳时间可做为颈动脉综合征的诊断标准。 Elderly compared with young people, resting sympathetic tone increased, heart vagus nerve tension higher than the sympathetic; on body position change, deep breathing, Eustachian tube, inflatable, cold, exercise and other environmental changes in vivo and in vitro Response response decreased; sinoatrial node β-adrenergic receptor density decreased. The power spectrum of heart rate changes can be used for noninvasive autonomic nerve function test. The stopping time of carotid sinus massage in the elderly can be used as the diagnostic criteria of carotid artery syndrome.