EMG quantitative analysis of triceps muscle upon irradiation by different magnetic fields

An action potential analyzer was used to measure the EMG characteristics, generated by the triceps muscle. Three EMG parameters were investigated: [i] the integrated voltage of the muscle's electrical activity in uV/sec, [ii] the frequency in spikes/sec, and [iii] the amplitude of the EMG. Triceps muscle in uV. The employed magnetic fields were: [a] constant magnetic fields of intensities 500 Gauss and 10 KG, [b] pulsating magnetic field [MF] of intensity 50 G/50 Hz, the exposure time for all fields used was 15 min. The results of the present work showed that the constant MF of 500 G induced a little on muscle performance ability when it was applied for a short duration, and the increase of the EMG amplitude was 11.3 percent on the average. While the constant MF 10 KG increased the amplitude of the EMG by an average of 33.6 percent. Therefore, when the muscle is exposed to constant strong MF, its energy increases and this, in turn improves its performance ability. However, a pulsating MF of 50 G/50 Hz increased the muscle performance ability by an average of 37.0 percent

Investigation of the responses of human's triceps muscle to successive magnetic fields

The present experimental technique was utilized to record, 1 analyze, and correlate the electromyography [EMG] of human's triceps muscle [upper limb] under the effect of different successive MFS. The exposure time used for all fields employed was 15 minutes, which is the average duration recommended in magnetotherapy. It was evident that the PMF 50 G/50 Hz proved to be the most effective MF, it increases the muscle efficiency [A] by 21 percent if it was lonely applied. This parameter enhanced to 22 percent when double fields f[1]followed by f2 were applied. Then, it attained a maximum increase of 24 percent when triple fields F[1] followed by F[2], then F[3] were employed

Biological effects of pulsating magnetic field on muscle performance ability in-vivo

The effect of magnetic field [MF] on different systems is due to 1 attraction or repulsion between the system and the applied field. This effect depends on the presence or absence of unpaired electron [s] in the system. Such systems have a permanent magnetic moment, and will be attracted appreciably toward an applied field because of their electron spin and magnetic susceptibility. If the system does not contain any unpaired electrons, the effect of applied MF is on the orbital motion of the paired electrons. The susceptibility in this case may be correlated with the radii of these orbits. A pulsating MF of intensity 50 Hz/50 G was used in the present work. A quantitative analysis has been done for EMG obtained from the triceps muscle of human. The basic characteristics of EMG which have been computed are; the integrated voltage, frequency, and the amplitude of the muscle's EMG. It was found that, pulsating MF increased the muscle performance ability, so that recruitment of other units, which happens normally in fatigue experiments, is less by 18.05 percent for 72.5 percent of the investigated cases. It is also concluded that, the pulsating MF of 50 Hz/50 G is of great effect on energizing the muscle during the fatigue process

Laser irradiation therapy in carpal tunnel syndrome

The study was carried out on 28 cases recommended for surgery. Sensory latency and sensory nerve conduction velocity were measured for the median nerve before and after every five sittings through a 20 sittings course of laser therapy. A decrease in the sensory latency values was observed for 64 percent of the individuals treated by laser irradiation. An optimal dose value of irradiation was observed after the fifth sitting of 20 minutes duration. An increase in sensory conduction velocity measurements was noticed for 68 percent of cases after the twentieth sitting. This study suggests that the laser irradiation partially relieves the nerve entrapment in more than 64 percent of patients, probably through its thermal and bio-stimulatory vasodilatation effect