Zabelis T N, Karandreas N T, Constantinidis T S, Papageorgiou C P
Department of Neurology, Athens National University, Aeginition Hospital, Greece.
Electromyogr Clin Neurophysiol. 1998 Jan-Feb;38(1):19-23.
In order to determine the effect of the Jendrassik manoeuvre (JM) on the latency and amplitude of the electrically recorded compound action potentials of the tendon reflexes (TR) as well as on their left-right asymmetry, the above parameters of the knee (KR) and Achilles (AR) TR were measured in 52 normal subjects (32 men and 18 women) aged 18-74 years (33 +/- 12.2) both at rest and during the JM, using a commercially available tendon hammer connected with the electromyograph. The left-right difference of the latencies was not statistically significant under both conditions. The knee reflex latency--on both sides--was shortened during the JM, while that of the Achilles tendon reflex was not significantly altered. The difference of the TR amplitude between the two sides in percentage of the lower value was not significant at rest and showed a marked diminution during JM. The manoeuvre caused also a net increase of the absolute values of the compound action potentials amplitude of both reflexes.
为了确定耶德热西克动作（JM）对腱反射（TR）电记录复合动作电位的潜伏期和波幅以及左右不对称性的影响，我们使用与肌电图仪相连的市售叩诊锤，对52名年龄在18 - 74岁（33±12.2）的正常受试者（32名男性和18名女性）在静息状态和进行JM时的膝反射（KR）和跟腱反射（AR）的上述参数进行了测量。在两种情况下，潜伏期的左右差异均无统计学意义。在JM期间，双侧膝反射潜伏期缩短，而跟腱反射潜伏期无明显改变。静息时，两侧TR波幅差异占较低值的百分比无统计学意义，而在JM期间显著减小。该动作还使两种反射的复合动作电位波幅绝对值净增加。
