Mechanically Evoked Torque and Electromyographic Responses During Passive Elbow Extension in Upper Limb Tension Test Position.

摘要

In neural tension testing, it is critically important to establish a method to investigate the relative contribution of different neuromuscular mechanisms to resistance developed during and at the limit of the upper limb tension test 1 (ULTT1), Three males and seven females in the age range 41-72 years (mean 56, SD+/-10) participated in a within subject repeated measure study. The study consisted of two major testing protocols. The first was an objective passive movement protocol, which utilized a KIN-COM dynamometer to measure range of motion (ROM) and evoked resistive torque during elbow extension. The second was an electromyographic (EMG) protocol, which allowed recording of EMG from 10 shoulder and arm muscles during the controlled passive elbow extension as the last component of ULTT1. A battery-operated micro-switch held by the subject, generated digital rectangular pulses to indicate occurrence of pain onset and pain tolerance limit during the experimental task. There was increased level of EMG activity prior to pain onset (P