Adaptive electromyograph for stomatological research

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4-channel adaptive electromyograph for stomatological research Synapsis is a specialized computerized complex for studies of face muscles and nerves bioelectrical activity. It is designed for recording, processing, analysis, graphical representation and saving in database of electromyogram and evoked responses of mastication and mimic muscles. Principal indications for use:

  • injuries of cranio-mandibular facial parts;
  • inflammatory processes of cranio-mandibular facial parts;
  • dental implantations;
  • inborn and acquired maxillofacial deformities;
  • temporomandibular joint diseases;
  • dentition defects;
  • pathological dental abrasion;
  • parodontium diseases;
  • bite anomalies;
  • dental restoration;
  • facial nerve paresis and paralysis;
  • polyneuropathy;
  • the treatment efficiency control.

Application spheres

  • Stomatology;
  • Oral surgery;
  • Orthodontia.
Masticatory EMG, tension test
Masticatory EMG, tension test

Function capabilities

Adaptive electromyograph for stomatological research Synapsis makes it possible to estimate reciprocal regulation and functional interrelation of symmetric antagonists, agonists and synergists in process of mastication and lower jaw movements. The system gives an opportunity to control the treatment efficiency and correct the treatment methods.

Electromyograph (electroneuromyographic analyser, myograph, neuromyograph) is connected to personal computer by means of USB. Power supply is provided from the computer (myograph doesnt need 220V). It enables to use the system not only in hospital but also in field conditions together with notebook accumulators of which supply the whole system. Interaction with the computer is implemented by means of special software.

Signals are recorded in 1, 2 or 4 commonly used channels in monitoring mode. You can optionally review recorded signals within changed time scale and amplitude scope, parameters of low-pass and high-pass filters. As an option you can also digitally process EMG signals. The signals are detected by either surface or needle electrodes. All the required computation operations are automated. There are standard parameters in the database which are compared with factual data. According to the data recordings computation table of basic parameters is formed. Raw signals can be printed in selected separate portions. The next techniques are available:

  • masticatory muscles analysis while clenching the jaws;
  • masticatory muscles analysis while chewing;
  • facial muscles analysis;
  • blink reflex analysis;
  • reciprocity analysis;
  • computation of motor (in its proximal and distant regions) and sensory nerve conduction velocity;
  • interference, spontaneous, integral myogram analysis;
  • turn-amplitude and spectral analysis;
  • motor unit potential analysis;
  • detection of F-wave characteristics;
  • H-reflex analysis;
  • analysis of decremental Mresponse to rhythmical stimulation and tetanization.
Surface EMG, mastication test
Surface EMG, mastication test


Electromyograph Synapsis software is designed for work under operating system Windows 7 and higher. The main distinctive feature of the software is ease of its use. No special skills are recquired for work with it except skill of computer using. Main window of electromyography program is designed similarly to desktop of operating system Windows. In the main window you can do the next actions:

  • open patients database;
  • open window of examination technique selection;
  • open software description;
  • view the contact information.
Surface EMG, tension test
Surface EMG, tension test

Database is necessary for storing the information about patients and examination results. Patients sorting in groups, internal system of the report generation according to examination results, results printing are available.

In examination window the required technique is selected. Each technique corresponds to its own program which is represented as a window of signal registration with set of special information (electromyograph parameters, computations, graphs, charts). Technique implementation is determined by medical requirements. Interaction with the programs is implemented by means of easy-to-use friendly interface. Actually researcher can be totally concentrated on patient examination, not on searching one or another option. Each technique can be adjusted to a user, i.e. all colours, window positions, parameter lists can be changed according to the user wishes.

Delivery set
Electromyographic system in standard configuration consists of the following basic parts:
electromyography unit, comprising 4-channel amplifier of muscle activity biopotentials, digital unit, electrical stimulator control unit, packed in one case;
Electromyograph Sysnapsis
Electromyograph Sysnapsis
a set of electromyography electrodes (surface electrodes);
a set of electromyography electrodes (needle electrodes);
a set of electromyography electrodes (stimulation electrodes);
special stand for the myograph;
software that provides signal video, recording and storing in database, digital analysis, report generation; the software is designed for work under operating system Windows 7 and higher.

To make the system function it is required to have a personal computer or notebook of the following configuration:

  • Processor at least 2 GHz, 2-core CPU (Intel i5 recommended)
  • RW memory not less 2 Gb;
  • Quantified (external/out) video card with memory minimum 512 Mb.
  • hard disk drive minimum 500 Gb;
  • monitor resolution with screen saver 1024 pixels in horizontal and not less 768 pixels in vertical direction both.
  • operation system Windows 7 or higher;
  • word processing program MS Word 2007 or higher, used to reports edition (unessential);
  • printer to export reports (unessential);
  • speakers for EMG audio reproduction;
  • Software for all devices is provided on a DVD, so DVD-ROM is required.
  • There must be at least 2 free USB ports on a PC to connect the electromiografy system.

The system can be set up into clients computer, but it is recommended to be delivered with a computer and a printer.

Performance characteristics

Number of channels4
Amplifier bandwidth (at level -3 dB)0 10 kHz
Sampling rate for each channel 40 kHz
Input noise mean square valueNot more than 6 uV
Range of signal amplitudes 0.1 uV 200 mV
ADC dynamic range 100 dB
ADC capacity24
High bound of pass bandwidth 0 1 kHz
Low bound ofpass bandwidth 1 Hz 10 kHz
Additional rejector filters for frequencies 50 Hz, 100 Hz, 150 Hz,
200 Hz, 250 Hz
Electrostastic discharge tolerance 15 kV
Supply voltage +V (from USB of PC)
Dimension 225 220 x 72 mm
Electrostimulator typeCurrent
Current pulse amplitude0 -100 mA
Current amplitude control step value1 m
Current pulse duration10 us 1 ms
Pulse duration control step value10 us
Pulse train Up to 50 times per second

Delivery conditions

Guarantee period 3 years.

If you need, our specialists can visit you and set or study system skills at clients workplace.

In this case you should pay travel expenses and specialists work.

If necessary you can take part in organized group studies by "Neirotech"specialists in St. Petersburg.

Delay in paying till the fact of delivery is possible.

Delivery period for client 10 days from the day of payment or signing contract.

Distributors have discount 15% and higher.