NeuroTrac® MyoPlus

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Features and Benefits

  • Portable Desk Top device. Combined single channel EMG/ Muscle Stimulation. Supplied with a desk top stand.
  • EMG + Stimulation mode {Passive + Active}, EMG Triggered Stimulation, Muscle Stimulation and EMG Modes.
  • Designed to be used for a wide range of Physiotherapy, Sports and Rehabilitation applications including Continence and Stroke treatment.
  • Custom programs enabling up to 5 phases to be set up in one program.
  • Optional Multilingual PC Database Software
  • Used as a learning tool with emphasis on improving treatment protocols using EMG and Neuromuscular Stimulation.
  • Locks programmes and records Patient Home Compliance on a daily basis.
  • Portable, light and user friendly.


Video Tutorials


Introduction to MyoPlus, a successor of old NeuroTrac ETS. Watch the differnce between two models and what are the improvemens in the new MyoPlus
Introduction into what ETS is, and how to use it.

What is ETS and how to use it

ETS (EMG triggered Stimulation) treatment is especially useful for stroke rehabilitation and Pelvic Muscle improvement. ETS is a combination of voluntary contractions with stimulation. A single ETS session typically lasts 5-15 minutes. The treatment is similar to EMG work/rest with the only one difference: as soon as you reach the target threshold during the Work period, the stimulation occurs which helps to support the contracted muscle.

The ETS session begins from adjusting the mA to the comfortable contraction level. Then it is a repetitive pattern of Work prompts; when the Patient should contract the muscle to reach the target threshold, and Relax prompts; when the Patient has time to relax and get ready for the next trial. The Target threshold measured in Microvolts could be set to Automated regime, when it goes up and down depending on the running muscle performance. The threshold level is always in the middle of the LED bargraph, normally displayed as an arrow - this helps to correlate the ETS target threshold with the visual bargraph.

What is EMG Biofeedback

Electromyography (EMG) or Biofeedback is a technique for evaluating and recording the electrical activity produced by skeletal muscles. EMG is performed using an instrument called an electromyograph, to produce a record called an electromyogram. An electromyograph detects the electrical potential generated by muscle cells when these cells are electrically or neurologically activated. The signals can be analyzed to detect medical abnormalities, activation level, recruitment order or to analyze the biomechanics of human or animal movement.

1. Using the NeuroTrac™  device, find the muscle and place a pair of skin electrodes on the main bulk of the selected muscle, with the separation of 1-5 cm between the electrodes.

2. Always remember to Use the reference Wire! Place the reference Electrode anywhere on the body, this will provide the accuracy to the measurement.


3. After you place the REF and measuring pair of electrodes, connect them to the unit. Your level of relaxation/contraction, measured in microvolts, is displayed. When there is no interference and a proper connection, a reading below 4 microvolts is considered as a relaxed muscle indicator.



4. When you contract your muscle, you can observe that the bargraph reading goes up with the contraction. If you cannot light the top LEDs on the bargraph, you can re-scale the bargraph to be more sensitive, by decreasing the threshold (THRS button).


5. You can use the optional PC Software with the MyoPlus: you will see your EMG biofeedback reading ont he PC as a running graph.


EMG Work/Rest Assessment

The NeuroTrac™ MyoPlus allows you to complete the Biofeedback Work / Rest assessment. This is an example of what your own might look like:



When you run the MyoPlus programme, the Patient is prompted to contract the muscles as fast as possible and keep them contracted over the threshold level, during the Work segment of time (5 seconds). After the Work segment, there is a Rest segment (5 seconds), where the Patient is prompted to relax the muscle as fast as possible and keep relaxed significantly below the threshold, over the Rest period of time. A good level of relaxation is below 4 uV. An excellent level is below 1 uV (make sure your device does not have too high or unstable a reading due to magnetic interference - read the manual thoroughly to help understand how to reduce magnetic interference as much as possible).


Once the Work / Rest assesment is finished, the statistics are displayed on the LCD display. The comparative analisys of the statistics collelcted from previous assessments gives you the key to understand the progress of muscle rehabilitation. The statistics are explained in the Manual.

Example of Work / Rest assessment (Using the NeuroTrac PC Software):

When your NeuroTrac MyoPlusis connected to the optional NeuroTarc Software, The Software generates visual prompts on the screen:


Work / Rest assessment report

The assessment record is stored in the Software. The Report of the Work / Rest assessments could be generated, where you can compare the graphs to be able to identify the progress trends:



When you do one trial (one repetition of Work / Rest), the unit measures the following  statistics:



Work Average [µV] - the overall average microvolts achieved during all the work periods of the session. Generally the higher the Work average is, the better the muscle performance.

Rest Average [µV]the overall average microvolts during all rest periods of the session.
Generally the lower the Rest average is, the better the muscle performance. It is very important how low you can relax your muscles in terms of microvolts. Below 4µV a muscle is beginning to rest. If the Rest average is above 4µV make sure you use the EMG reference lead wire! A reading above 4µV commonly means the muscle is overstimulated or tired after a long EMG training session.

Onset Average [sec] - This is the average time taken in seconds to achieve 75% of the work average of all work segments, any values over 2 seconds are ignored.
Generally this parameter measures how fast you can contract a muscle, the shorter the Onset average time is, the better the muscle performance. Readings below 1 second can be considered normal. The time it takes to contract a muscle gives an indication on the recruitment of the fast twitch fibres. If the onset time was slow, the recruitment percentage of the fast twitch fibres would be less than if the onset time was faster.

Release Average [sec] - This is the average time taken in seconds to relax below 37.5% of the work average of all work segments, any values over 2 seconds are ignored. Generally this parameter measures how fast you can relax a muscle, the shorter the Release average time is, the better the muscle performance.
Normally a healthy muscle reverts back to a low resting EMG value in less than one second. If the muscle takes longer to revert back to rest then there will be a reason, such as muscle or nerve damage or some other underlying problem.
UROLOGY: p01-p19 SPORTS: p01-p21 REHABILITATION: p01-p09 FITNESS p01-p07
P1 Pelvic floor pain
P2 Urge incontinence 1
P3 Stress incontinence 1
P4 Stress incontinence 2
P5 Frequency / Urge 1
P6 Frequency / Urge 2
P7 Frequency / Urge 3
P8 Lack of sensitivity
P9 Pelvic floor work out
P10 Building up endurance
P11 Relaxing the pelvic muscle
P12 Prolapse
P13 Stress incontinence 3
P14 Stress incontinence 4
P15 Urge incontinence 2
P16 Urge incontinence 3
P17 Frequency
P18 Flaccid muscle
P19 Weak pelvic muscle
P1 Warm Up
P2 Active recovery
P3 Endurance
P4 Resistance 1
P5 Resistance 2
P6 Resistance 3
P7 Resistance strength 1
P8 Resistance strength 2
P9 Resistance strength 3
P10 Strength 1
P11 Strength 2
P12 Strength 3
P13 Max strength 1
P14 Max strength 2
P15 Max strength 3
P16 Max strength 4
P17 Explosive force 1
P18 Explosive force 2
P19 Hypertrophy
P20 Agonistic 1
P21 Agonistic 2
P1 Muscle growth
P2 Spinal column
P3 Parectic extremities
P4 Facial palsy 1
P5 Facial palsy 2
P6 Disuse atrophy
P7 Stroke 1
P8 Stroke 2
P9 Multiple sclerosis
P1 Anaerobic preparation
P2 Stretching 1
P3 Stretching 2
P4 Stretching 3
P5 Rest muscle balance
P6 Improve muscle aerobic metabolism
P7 Improve muscle anaerobic metabolism


P1 Tired legs
P2 Lipolysis
P3 Muscle toning
P4 Muscle firming

EMG P2 EMG Custom
ETS P3 ETS Custom


Protocols Author Download
Treatment of the Hemiplegic Shoulder (Stroke) through Biofeedback: Case Study Verónica Bargueño, Juan Nicolás Cuenca & Eric Lazar
F.E.S. in Stroke Juan Nicolás Cuenca & Eric Lazar
Urinary Incontinence Julia Herbert Grad. Dip. Phys. MCSP SRP Specialist Continence Physiotherapist
Stress Urinary Incontinence Anna Pawlaczyk Specialist in Gynecology
Stress Urinary Incontinence, using EMG Triggered Stimulation - NEW Maciej Kisiel, Henryk Konon MD
Pelvic Floor Muscle Activity in Sitting & Standing Postures R Saphod, C Maher and C Richardson
Fecal Incontinence Pirkko Raivio Specialist Continence Physiotherapist
Incontinence Case Reports Pirkko Ravio Specialist Continence Physiotherapist
Patellofemoral Pain James Selfe. PhD. MA. GD Phys. MCSP. SRP. Lecturer Chartered Physiotherapist.
Prolapse: Pelvic Floor Muscle Training for Women Karen Radford, MSc, MCSP and Funmi Odofin, BSc, PG Cert. MCSP

1. EMG

  • Single Channel
  • EMG Range: 0.2 to 2000 μV RMS (continuous)
  • Sensitivity: 0.l μV RMS
  • Accuracy: 4% of μV reading +/-0.3 μV at 200 Hz
  • Selectable Bandpass filter - 3db Bandwidth,
    • a. Wide: 18 Hz +/- 4 Hz to 370 Hz +/- 10% - Reading below 235 microvolts 10 Hz +/-3 Hz to 370 Hz +/- 10% - Readingabove 235 microvolts
    • b. Narrow: 100 Hz +/- 5% to 370 Hz +/- 10%
  • Notch filter: 50 Hz (Canada 60Hz) - 33 dbs (0. 1% accuracy)
  • Common Mode Rejection Ratio: 130 dbs Minimum @ 50 Hz
  • Battery: PP3 Alkaline
  • Work / Rest periods: 2-99 seconds
  • Number of Trials: 1-99

2. Neuromuscular Stimulation

  • Single Channel
  • Amplitude: 0-90 mA into 500 Ohm load - actual mA will tend to be less than indicated due to Electrode impedance: at 1000 Ohms load (Electrodes in poor condition) the maximum will be limited to 75 mA, at 1500 Ohms load the maximum will be limited to 50 mA.
  • Type: Constant current, maximum output voltage 70 Volts +5 / -10 Volts
  • Waveform: Symmetrical, rectangular, bi-phasic with net zero DC current
  • Pulse width selection: 50-450 μS (2% accuracy)
  • Pulse rate selection: 2-100 Hz (2% accuracy)
  • Work / Rest periods: 2-99 seconds
  • Time 1 - 99 minutes
  • Ramp up time: 0.1 - 9.9 seconds
  • Preset and user programmable treatment Programs
  • Automatic output shut off with detection of open electrode above 0.5 mA

Low battery indication at 7.4 volts +/- 0.2 volts and automatic shut off 4 minutes
after pressing last key, unless infra-red is turned on.
Note: Replace battery immediately.

Environmental Conditions for use:
+10 to +30 degrees Centigrade. 0-90% Humidity.
Environmental conditions for storage & transport:
-10 to +50 degrees Centigrade. 0-90% Humidity.
Physical Dimensions: Length 147 mm, Width 70 mm, Depth 28.9 mm
MyoPlus device: 0.13 Kg (without battaery)
PP3 Alkaline battery: about 0.04 Kg