title: Velocity of spreading of the excitation along the muscle fibres of human motor units measured by superficial electrodes.
abstract: It was demonstrated experimentally that the errors in measuring of the velocity of spreading of the excitations along the muscle fibres of human motor units were different when different types of surface electrodes are used. On this basis a new principle of double measurements is proposed which is applicable to all methods using surface electrodes. The principle was applied with the method for measuring velocity of the potentials of separate motor units. Correct values of velocity were obtained when v1 measured by one type of electrodes was equal to v2 measured by other type of electrodes both types abolishing to a different degree the influence of the volume conductor on the error. The mean value of velocity for m. biceps brachii using equal double measurement was 3.62 +/- 0.51 m/s.
authors.forename: A
authors.initials: A
authors.lastname: Gydikov
authors.forename: N
authors.initials: N
authors.lastname: Gantchev
mesh_terms: D000200:Action Potentials; D004566:Electrodes; D004576:Electromyography; D006801:Humans; D009046:Motor Neurons / Q000502:physiology*; D009132:Muscles / Q000294:innervation