eWave+(EEG,ERP|32,40,64,128)

EEG, which is a non-invasive method for measuring brain electrical activity, helps clinicians in diagnosing conditions affecting brains such as head injuries, headaches, brain tumors, sleep problems and etc.  The eWave+ device can be used in hospitals so as to help clinicians diagnose special conditions. Besides, due to eProbe software’s abilities, it is possible to import the recorded data into MATLAB, EEGLAB, and LABVIEW environments for processing purposes.

Transcranial Magnetic Stimulation (TMS), which is a non-invasive form of brain stimulation, uses a changing electromagnetic field to cause electric current at a specific area of the brain. Due to the latest developments, simultaneous recording of EEG and TMS has become possible. The combination of TMS with simultaneous EEG provides the possibility to non-invasively probe the brain’s excitability in real-time.

Transcranial Direct Current Stimulation (tDCS) is a form of brain stimulation, where very low levels of constant current are delivered to specific areas of the brain. Basically, tDCS is developed to help patients with brain injuries or psychological conditions such as depression. The combination of tDCS with simultaneous EEG provides valuable information about tDCS mechanisms. The combined EEG-tDCS system can also be used for the preventive treatment of neurological conditions. eWave+ device has provided a simultaneous recording of EEG with TMS and tDCS.

Other ERP acquisition systems record ERP as command executes from the monitor, except eWave+, which records stimulus presentation synchronously in ERP Results. This exclusive feature only exists in eWave+ and makes it the most explicit ERP acquisition system in the world.

High-Frequency Oscillations (HFOs) usually occur in epilepsy patients which can be recorded with the Electrocorticogram (EcOG) with the implemented electrode grids in their brains. Recording HFOs requires a high-performance bio-signal amplifier with high sampling frequency and a very good signal-to-noise ratio (SNR) and resolution. Mapping neural networks are important for pre-surgical planning in epilepsy patients. Since HFOs can be found in such neural networks, brain surgeons need to distinguish physiological HFOs from pathological ones.

 Due to eWave+’s high sampling frequency (1000 Hz) and very good SNR, it has the ability to record HFOs. ECoG electrodes from Ad-Tech, PMT, Unique Medical and Cortec can be used with eWave+.

eWave+ is compatible with a wide range of software in order to meet the needs of various users including engineers, researchers, scientists, clinicians, and psychologists. Include MATLAB, LABVIEW, NeuroGuide, Tobi, etc…

EEG and fNIRS are two complementary techniques for measuring brain activity. While EEG measures the magnetic field created by firing neurons in the brain, fNIRS measures the change of oxygen in the blood when a brain region becomes active. By combining EEG and fNIRS, a more complete picture of the brain is obtained, which includes activation and energy demand of neurons. eWave+ in combination with eFNIRS sensor enables simultaneous recording of EEG and fNIRS. By connecting eFNIRS to eCapflex or eCapfabric with 8 fNIRS sensors, simultaneous recording of EEG and fNIRS becomes possible.

Slow Cortical Potentials (SCPs) are based on electrical activity in the brain usually less than 1 Hz, which are generally used in neuro-feedback treatments. eWave+ provides the possibility to record SCPs.

Auditory brainstem responses (ABR) or brainstem auditory evoked potentials (BAEP) are early – short-latency – EEG components, evoked by acoustical stimulation.

The name refers to the generators: these components are mainly – however not exclusively – originated from the brainstem, relatively far away from the EEG electrodes. Furthermore, the ABRs are characterized by small-amplitude – below 1 µV – and short-latency – five to seven peaks within 10 m.

Mobile / wireless EEG applications and MoBI (Mobile Brain/Body Imaging) have become increasingly popular over the past few years. More and more scientists wish to push the boundaries of their EEG research and get answers to questions like What does the brain do when the subject is moving (e.g. during a skydive or when running or cycling)?

In other words “recording EEG under more exceptional and unusual conditions” is on the rise. Unusual conditions again, simply means that the traditional approach of conducting EEG experiments in a lab or shielded cabin or making sure that the subject moves as little as possible during the recording, are abandoned.

Due to the continuous enhancement and refinement of EEG equipment previous limitations of recording EEG are overcome. Comfortable, closely fitting, and robust electrode caps that can be prepared quickly as well as light and small, wireless but still rugged amplifiers are opening up new fields to perform EEG experiments (e.g. outdoors).