Quantitative Electroencephalography (qEEG) and Recording of Event-Related Potentials (ERPs)

Recent advances in computer science have led to remarkable advances in electroencephalography (EEG). Quantification of data and the possibility to analyze EEG data have expanded the use of this medical procedure to various sciences such as neuroscience and psychology. EEG is now recognized as a viable tool for the analysis of cerebral functions in different modes (sleeping, awakening, and doing different tasks). EEG allows you to monitor cerebral functions in very short periods of time (e.g. milliseconds). As a result, many researchers employ this tool to examine linguistic, perceptual, and cognitive processes.


 EEG devices have many features. Depending on the type of study, you may use a certain type of amplifier. If you desire to have a device with the highest possible temporal accuracy, you have to set the highest sampling rate. If spatial accuracy is more important to your study, you need to select a higher number of stimulation channels. EEG is a highly sensitive medical procedure that must be performed by an experienced person.

Compared to other neuroimaging modalities (e.g. fMRI), EEG and ERP are less costly and useful and can effectively be used in studies on the chronology of cerebral activities. Greater temporal resolution and lower spatial resolution are among the main features of EEG, something which is exactly the opposite in fMRI. EEG measures the cerebral activity directly, whereas fMRI does so indirectly. EEG can be used as a portable tool in research on sports related to science or neuro-marketing, whereas fMRI does not offer such a feature. EEG can also measure ERPs. During EEG, the subject is exposed to a stimulus (sensory, motor or cognitive) and their responses are recorded. The number of stimuli must be large enough to represent a visible wave. Some ERP components related to a patient's behavioral and cognitive responses such as P300 have been identified so far.


 Devices in Atieh

Atieh is equipped with two devices for recording EEG/ERP. Miastar-201 is a 21-channel device that is able to EKG and EOG biological signals. It can record 19 EEG channels at a sampling rate of up to 500 Hz in a bandwidth ranging between 1 and 70 Hz. This device can also record ERPs. Before the beginning of the research, the intended task should be designed in PsyTask and then executed. NeuroConn amplifier is another device used in this laboratory for recording EEG/ERP.


 With 32 stimulation channels of EEG registration and a sampling rate of 26-40, this device provides a desirable level of spatial and temporal accuracy for your research. Another feature of this device is the ability to execute tasks in MATLAB in ERP research.