老人肢体震颤表现为肢体不由自主地来回摆动，摆动的频率或高或低，程度各异。这种肢体震颤大部分是生理因素或精神因素造成的，真正由疾病引起的只是少数。　　正常人的四肢、头部、舌、躯干平时就存在着震颤动作。随着年龄的增长，颤动的幅度增大而频率减慢，尤其在一定姿势 Elderly physical tremor manifested as limb involuntarily swing back and forth, the frequency of swinging high or low, varying degrees. Most of this physical tremor is caused by physical or mental factors, the real cause of the disease is only a minority. Normal people’s limbs, head, tongue, trunk there is usually tremor action. As you grow older, the amplitude of the jitter increases and the frequency decreases, especially in certain positions