Equipment

Basic equipment

Magnetoencephalography (MEG)

The core system at the MEG Center is the 306-channel magnetoencephalograph ‘NeoromagVectorview’ (Elekta Oy, Finland).

Manuals:
Hardware Technical Manual
Hardware User's Manual
Data Acquisition Manual
Stimulus System Manual
Sensor Tuner Manual

Registration of other biological signals

The ‘NeuromagVectorview’ system includes 128 MEG-integrated EEG channels for recording of electrical potentials from the surface of the head. At present we usе the 64-channel EEG cap manufactured by Elekta Neuromag for simultaneous MEG/EEG registration. The system also has 4 integrated bipolar channels for recording the electrooculogram (EOG) , electrocardiogram (ECG) , and electromyogram (EMG) .

Magnetically shielded room

The MEG system is located inside a two-layer magnetically shielded room "Ak3B" (Vacuumschmelze GmbH, Germany) , which suppresses external magnetic fields and makes possible registration of the tiny electromagnetic fields of the brain.

More details here

Helium Recycling System

The functioning of the superconductive MEG sensors (‘squeeds’) requires cooling them to a temperature close to the absolute zero. Therefore, the sensors are placed in liquid helium. The helium recycling system "ATL160" of Quantum Design company liquefies the evaporating gas and provides for its re-use, which significantly reduces expenses for maintaining the system in a working state.
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Auxiliary equipment

A variety of auxiliary stimulation equipment available at the Center allows to perform a wide range of experiments. The MEG can be registered while the subject is sitting or supine. The MEG-unit is equipped with video cameras for continuous behavioral monitoring and videorecording.
An audio-communication system allows continuous comunication with the subject during the experiment.

Visual stimulation

For visual stimulation we use the projector «Panasonic PT-D7700E-K».
Description

Auditory stimulation.

To apply auditory stimuli we use MEG-compatible audio system "NeuroScan STIM" (Compumedics, USA).

Electrostimulation

For electric stimulation of the median nerve, we use two electric stimulators "Digitimer DS7A".
Description

Tactile stimulation

For tactile stimulation, we use fiber-optic devices developed at the Center.

Registration of motor responses

To register motor responses, we use the system "932 fORP" (Current Designs, USA) , which includes two four-button consoles and a trackball. We also use various fiber-optic devices developed by the specialists of the Center for specfic experiments. Description

Registration of movements

To record subject’s movements, we use three-axis accelerometers "iMEMS ADXL330" (Analog Devices, USA).
Description

Registration of oculomotor behavior

To monitor direction of the gaze, and to record saccades, fixations, and changes in pupil size, we use EyeLink-1000 eyetracker (SR Research Ltd., Canada). The system makes it possible to conduct oculomotor behavior studies simultaneously with MEG recording of MEG or without MEG recording.
Description

Triggers.

To synchronise stimulation events and subject’s responses with the MEG data, we use two 16-channel analog-digital receivers.

Biological feedback

The communication system «Бослаб БИ-012» allows to conduct experiments, psychophysiological diagnostics, and various kinds of trainings based on biological feedback. The principle of biological feedback is widely used for correction of many disorders of the central nervous system.
Description

Electroencephalography (EEG)

The center posesses an autonomous 32-channel "ActiCHamp" system for recording EEG, ECG and EMG (Brain Products GmbH, Germany). This system is equipped with active electrodes, which allow to significantly reduce the noise level.

The "ActiCHamp" system allows registration of the EEG separately from the MEG, which may be relevant in certain groups of subjects (infants and children of preschool age, handicaped people, etc.) . For this purpose, the MEG-Center is equipped with a separate grounded shielding room, specially designed by Russian specialists.
Description


Software.

To biuld stimulation schemes and to register stimulation marks and subject’s responses, we use the commercial Presentation software (Neurobehavioral Systems, USA), as well as free software created within the Python environment (PsychoPy, Anaconda).

The MEG Center is also equipped with technical tools for preparation of experiments, as well as with diagnostic equipment (e.g. WaveAce 222 oscilloscope (LeCroy, USA), signal generator AKIP-3402 (Prist, Russia), a soldering station etc.)