In TMSi — an Artinis company blog, you will find the latest trends in EEG and HD-EMG, related studies and applications, insights from the leaders of EEG/HD-EMG, not to mention detailed tips and tricks for your research!
Multimodal Measurement: Integration of EEG & fNIRS
The integration of EEG and fNIRS combines the strengths of both techniques, capturing electrical activity and hemodynamic responses for a deeper understanding of brain function. This multimodal approach enhances research in areas like brain-computer interfaces, hyperscanning, and clinical studies, offering high temporal and spatial resolution in a non-invasive, portable setup.
Unipolar vs. Bipolar EEG Measurement
In the field of electrophysiological measurements, we distinguish two types of measurement principles: the bipolar and the unipolar measurement principle. Here we will explain the difference between the principles as well as the different unipolar measurements that exist.
Event-Related Potentials in EEG
ERP is the neural response associated with a specific sensory, cognitive, or motor event (e.g. a stimulus). An ERP is often recorded using scalp electroencephalography (EEG) and looks at the average change in voltage over time starting at the onset of the stimulus over multiple trials. ERP measurements have a precise temporal resolution, which is useful in testing perception and attention.1 This information can be used to evaluate brain functioning by looking at how the brain normally processes information, as well as viewing how this processing may differ in neurological or psychiatric disorders.
Motion Artifacts on EEG
A common problem in measurement setups where the subject is allowed to move around is the movement artifact. Movement artifacts on EEG measurements originate from two different phenomena: the movement of the cables and the movement of the electrode.
What Is the 10-20 System for EEG?
The 10-20 system is an internationally recognized method for standardizing the placement of EEG electrodes on the scalp. This system ensures consistent and replicable EEG recordings by using specific anatomical landmarks to determine electrode positions, facilitating accurate assessment of brain activity across various regions. Extensions of this system, such as the 10-10 and 10-5 systems, offer higher resolution measurements by incorporating additional electrodes between existing positions.
Basics of Measuring Bioelectricity in humans
Bio-electricity refers to the measurable potential differences between two points on the body, providing valuable insights into the body's electrical activity. Understanding the origins of these potentials and the challenges involved in measuring them is essential for accurate interpretation and application.
Common physiological EEG artifacts
A guide on how to recognize physiological artifacts in the electroencephalogram (EEG) and how to manage them.
Tips for getting good EMG signals
EMG allows you to record electrical activity produced by muscles. Several factors can influence the signal quality while recording EMG signals. The quality of an EMG measurement largely depends on skin preparation, electrode positioning, and the quality of the EMG equipment.
This blog explains why these factors are important and how you can obtain good-quality surface EMG signals.