RussianCurrent Dr. Mohammed TA Omar with 25 pulse in each burst. Physical Characteristics of Current Frequency : 2. which is developed by Russian physiologist named Yakov Kots 1977. Current Amplitude: The maximum current amplitude is 100mA with the most clinical used is 70mA.500Hz ( 25KHz). Bursts frequency: Russian current is commonly delivered at 50bursts per second (why).Russian Current Russian current is an even alternating medium frequency. applied as series of bursts. . Russian Current Wavefrom : The most commonly used is Polyphasic sine wave. . For example 10:40 For example 10:50 These the optimal recommended ratio that induced muscle strengthening. The on : off ratio is defined as the ratio of the time during which there is stimulation (contraction) to the time during which there is no stimulation (no contraction). between successive evoked contraction (on time). which is very important to prevent muscle fatigue.On: Off Ratio versus Duty Cycle. because it Allow an adequate period of rest (no-contraction) during off time. Duty cycle. As the ramp allows gradual increase of intensity with associated gradually increase of muscle contraction. Setting the ramp time is very important to evoked contraction similar to muscle contraction. For example 10:50 sets up a duty cycle of =10/ (10+50)x 100=16.7%. . Duty cycle is the proportion of on time to the summation of both the on and off time expressed as percentages. The Russian current produced with duty cycle of 50%. Ramp-Up and Down. lasting for 10 seconds. which is muscle contractions. The recommended duration of treatment is 10 minutes. and separated by 50seconds and this cycle is repeated 10 times . once daily per week for several weeks (3-6months) . Duration and frequency of treatment.Training protocol with Russian current The widely and most popular clinical protocol used with Russian current is (10/50/10). Physiological Effects of Russian Current . As a result. the repeated delivery of these bursts of pulses at a given current amplitude induces motor nerve depolarization leading to muscular tetanic contraction. (not the total number of pulses within each burst) is determine the magnitude of the physiological effects induced at the peripheral nerve level as each burst of pulses is seen as a single pulse at the nerve/muscle membrane. Russian current is believed to have the capacity to depolarized both sensory and motor nerve fibers to evoked tetanic muscle contraction that are painless (due to sensory nerve blocked) and stronger 40% than those generated by voluntary control.The net physiologic effects depends on The total number of bursts delivered per second. . . higher amplitude can be applied to deeper motor nerve fibers. according to the size principle. type I motor units to fast type II motor units. motor unit fire synchronously . and in reverse order from fast type II motor units to low. During the voluntary muscle contraction. which are associated with high force fast-twitch motor unit. in order from slow. During electrically evoked muscle contraction.The net physiologic effects of depends on Because of painless effect of Russian current. motor unit are recruited asynchronously and. type I motor units. motor nerve depolarization induce activation of fast type II motor units High level electrically evoked muscular contraction Contraction against external load Muscle strengthening .Russian current Medium frequency modulated sinusoidal current Depolarization of sensory and motor nerve fibers Synchronously. is to Over the lumbar or abdominal strengthening the muscular area during pregnant system of healthy and athletic Over hemorrhagic area persons Over neoplastic area Post-knee ligaments surgery Over metallic and electronic implant Post-arthroscopic knee Over area of impaired skin surgery sensation Following ligament sprain .Indication and Contraindications for Russian Current Indications Contraindications The only indication for use of Over the anterior cervical area Russian current as introduced Over the trnasthorcic area by Kots in 1977 .