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Regular version of the site

Centre for Cognition & Decision Making: Facilities

Neuroimaging techniques (EEG-MEG)

Electroencephalography  (EEG) is the recording of electrical activity along the scalp. EEG measures voltage fluctuations resulting from ionic current flows within the neurons of the brain.Electroencephalography is a safe and non-invasive method, which has a very good time resolution, but a poor spatial resolution. EEG is widely used in diagnostics and research, as well as in real-time applications (e.g. BCIs).

Our equipment
24-bit amplifier ActiChamp 
Active electrodes actiCap
CapTrak (BrainProducts)
Magnetoencephalography (MEG) is a functional neuroimaging technique for mapping brain activity by recording magnetic fields produced by electrical currents occurring naturally in the brain, using very sensitive magnetometers. Arrays of SQUIDs (superconducting quantum interference devices) are currently the most common magnetometer, and SERF being investigated for future machines. Applications of MEG include basic research into perceptual and cognitive brain processes, localizing regions affected by pathology before surgical removal, determining the function of various parts of the brain, and neurofeedback.

We use Elekta Neuromag 306-channel MEG system at Centre for the neurocognitive research (MEG-Centre) at the Moscow Psychological and Pedagogical State University

 

Elekta

 

Eye-tracking  is a process of measuring either the point of gaze (where one is looking) or the motion of an eye relative to the head. An eye tracker is a device for measuring eye positions and eye movement. Eye trackers are used in research on the visual system, in psychology, in cognitive linguistics and in product design.

OUR EQUIPMENT
 
EyeLink 1000 Plus (SR Research) 

Non-invasive brain stimulation (NIBS) techniques

Transcranial Magnetic Stimulation (TMS) is a non-invasive method to cause depolarization or hyperpolarization in the neurons of the brain. TMS uses electromagnetic induction to induce weak electric currents using a rapidly changing magnetic field; this can cause activity in specific or general parts of the brain with minimal discomfort, allowing for study of the brain's functioning and interconnections. The simultaneous recording of EEG, bipolar as well as peripheral signals opens up new scenarios in the investigation of the mechanisms underlying for example emotional behavior.

OUR EQUIPMENT

Transcranial electric stimulation (TES) with low­ intensity (0,5 мА – 2 мА) direct current (tDCS) or alternating current (tACS, tRNS) is used to generate neuromodulations in spontaneous neuronal activity. Physiological studies have demonstrated that DC flows through the skull and the outer layers of the cortex, modifies neuronal crossmembrane resting potentials, influences the level of neuronal excitability, and modulates firing rates. Depending on the orientation of the cells with respect to the current, the membrane potentials can be hyperpolarized (anodal stimulation) or depolarized (cathodal stimulation) by several mV. This change in neuronal excitability effects several alterations in brain function, including motor, sensory, and high-level cognitive function. On the other hand, tACS demonstrate frequency-dependent and entrainment effects, presumably, interacting with endogenous oscillatory activity. This method is actively used in medicine and research.

OUR EQUIPMENT

 

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