痉挛性失音（ｓｐａｓｍｏｄｉｃｄｙｓｐｈｏｎｉａ，ＳＤ）是一种少见的发音困难性疾病，其特征是运动诱发的、患者自己不能控制的、声带肌肉自发性的痉挛性运动，紧张时症状加重，表现为挤压、紧缩和张力过强的破裂声音。通常在儿童期发病，以说话时突发爆破音、不连续... Spasmodic dysphonia (SD) is a rare dysarthria that is characterized by motor-induced spontaneous spastic movement of the vocal cord muscles that is involuntary in the patient’s own condition and is exacerbated by stress. Symptoms include squeezing, Tightening and tension is too strong rupture sound. Usually onset in childhood, sudden burst of sound when speaking, discontinuous ...