The AcqKnowledge software will record EEG data, filter the data into the specific bandwidths for Alpha, Theta, Beta and Delta, and display the results on-line. Often, researchers also need to quantify the activity in each band.
This Application Note provides a useful technique for analyzing EEG signals and quantifying the activity in each band. This note will explain how to:
Integrate the alpha wave EEG data to get a better view of alpha wave activity.
Identify where the integrated data crosses certain threshold values.
Measure the amount of time that was spent in a heightened alpha state and count the number of times that the subject entered the state.
This note describes the procedure for working off-line with a saved data file, but you can also perform these functions online (as noted at each step).
The examples in this note use a raw EEG signal taken from a human subject and filtered to show the Alpha wave activity.
EEG: Electroencephalography - Wired and wireless EEG solutions. Record up to 32 channels of EEG and use software features for filtering, removing EOG artifacts, and complete frequency analysis.
ERS: Evoked Response - Record evoked, late, and field potentials, as well as startle and nerve conduction. Powerful on- and off-line averaging features (P300), and dual stimulation ability with the MP150.
Psychophysiology - Record and analyze BP, ECG, HRV, EDA, EMG, EEG, EOG, RSP, etc. Interface to stimulus presentation programs...use automated analysis routines to easily score and analyze data.
Sleep Studies - Long term recordings with up to 16 channels of data. Record EEG, EOG, EMG, respiration, temp., sound, limb position and more. Filter out EEG frequencies to score sleep stages.
Amplifiers & Interfaces - Use BIOPAC amplifiers with MP Systems, as stand-alone devices, or with 3rd-party flow meters, force plates, sono-micrometers, telemetry equipment, metabolic carts, etc.
Alex Dimov, BIOPAC Sales Executive, was interviewed at the Neuromarketing World Forum by Inside Marketing to discuss how virtual reality can improve marketing research. Alex explains how VR can be used to present virtual iterations of a product to save time and money, and notes that measuring physiological responses adds lots of information for product and messaging […]
February 14, 2019 BIOPAC Systems, Inc. Goleta, CA USA New “Smart Amplifiers” make it easier than ever for life science researchers to get great data Fast Setup & High Performance Smart Amplifiers improve performance by amplifying the physiological signal close to the subject, which allows a high-level voltage connection to the data acquisition system and reduces noise artifact. […]