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…
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This application note describes the setup required to apply auditory and visual stimulus via SuperLabTM to elicit a startle response and record and analyze the EMG response of the orbicularis…
Cardiac Output can be noninvasively determined by employing electrical bioimpedance measurement techniques. Electrical bioimpedance is simply the characteristic impedance of a volume of tissue and fluid. In the case of…
Several methods can be used to score the number of electrodermal response (galvanic skin response) changes. In all cases, it is assumed that the EDA (GSR) signal was sampled in…
This application note explains how to import BSL journal data into Microsoft® Excel or other statistical analysis (spreadsheet) packages.
The BIOPAC Hardware API gives software developers control over BIOPAC acquisition units. A Hardware API is available for MP160, MP150 & MP36R (Research Systems) or MP36 & MP35 (Education Systems, 4-channel units); not available…
This application note describes known issues for current AcqKnowledge software releases.
This application note details a convenient method to measure VO2 max without CO2 values. Downloadable templates: vo2simplified.gtl vo2simplified_Meta.gtl vo2simplified_Rescale.gtl
This application note explains how to generate pseudorandom stimuli during a stimulus presentation experiment.
Generally considered, if the transducer is able to be used in the MRI (see BIOPAC MRI Use declarations), the transducer signal can be relatively easily recorded during an MRI scan (an MRI…
The NIBP100A is a noninvasive blood pressure monitor that uses a pressure sensor placed on the wrist over the radial artery. This device uses a “sweep technique,” which applies a…
This application note provides compatibility details for current release BIOPAC software and Apple iMac or MacBook Pro computers using Intel Core Duo (x86 processors) hardware.
BSL Systems have been cited in thousands of Scientific Papers. Selected citations are provided below—for a complete list, search Google Scholar for Biopac Student Lab software and related hardware: MP36,…
For Magnetic Resonance Imaging (MRI) applications, it can be important to collect auxiliary physiological data in conjunction with the Nuclear Magnetic Resonance (NMR) image data. This auxiliary data includes physiological…
The NIBP100B is a noninvasive blood pressure monitor that uses a pressure sensor placed on the wrist over the radial artery. This device uses a “sweep technique” which applies a…
The NIBP100B-R is a noninvasive blood pressure monitor that uses a pressure sensor placed on the wrist over the radial artery. This device uses a “sweep technique” which applies a…
This Application Note explains how to normalize EMG data to measure Maximum Voluntary Contraction (MVC).
This Application Note explains how to normalize EMG data to measure Maximum Voluntary Contraction (MVC).
This Application Note explains how to optimize ECG R-R interval data for Heart Rate Variability studies by using a template matching approach. It also explains how to identify erroneous R-R…
The BIOPAC virtual reality platform provides controlled and replicable experimental setups and allows manipulation of the environment (and avatars) that would be impossible or prohibitively expensive in the real world. …
This application note is concerned with the recording of Zygomaticus measures using a pressure pad transducer vs. EMG electrodes during MRI or fMRI investigations. With some MRI protocols, especially those…
This application note addresses the following options for controlling the SDS100 Scent Delivery System Manually control the scent palette Script the scent palette control via the Vizard Lite software Use…
This application note details the required setup for sending digital signals to AcqKnowledge from Vizard using a parallel port connection and the STP100C. Download the instructions (PDF) and zipped files…
This application note details the required setup for sending digital signals to AcqKnowledge from Vizard using a 37-pin Measurement Computing card and the STP100C. Two cards are currently supported USB-DIO24/37…
This application note is concerned with the recording of real-time EMG during a fMRI investigation. The following BIOPAC products were used for this measurement: MP150WSW data acquisition system with AcqKnowledge…
This application note is concerned with the recording of real-time ECG during a fMRI investigation. The following BIOPAC products were used for this measurement: MP150WSW data acquisition system with AcqKnowledge®…
This application note is concerned with the gated analysis approach to analyze nearly any kind of data in the MRI. An example using EMG data is shown.
This application note describes how to use BIOPAC stimulators (STMISOL/STMISOLA or STMISOC), E-Prime® experiment generation software, and a Measurement Computing Corporation (MCC) data acquisition device (USB1208HS-4AO) to execute stimulus delivery.…
The DTU200 Dual Channel Gating System extracts timing information from cardiac and respiratory signals to trigger MRI acquisitions.
AcqKnowledge calculates heart rate variability (HRV) using the Welch Periodogram and least squares de-trending methods. To properly select the parameter values needed for the calculation of the Power Spectral Density, which…
This application note describes the procedure to determine a relational curve between specified latencies and the Inter-Stimulus Interval (ISI) using the online averaging feature in AcqKnowledge. The Inter-Stimulus Interval (ISI)…
The ability to noninvasively assess voluntary muscle effort has wide application in physiologic studies, sports and rehabilitation medicine, as well as movement science. Traditionally, surface electromyography (sEMG) has been used…
This application note describes the procedure and settings to record an n-back Task using the fNIR100 COBI software, then import it into AcqKnowledge, merge files, and perform ensemble averaging. Click…
Aerobic capacity is also known as maximal oxygen uptake or maximum oxygen consumption (VO2 max). VO2 max is the maximum capacity of a subject to transport (uptake) oxygen and utilize…
BIOPAC Basic Scripting Customize – Acquisition setup and analysis Automate – Acquisitions and perform batched analysis Simplify – Add dialogs and prompts to assist users Expedite – Reduce analysis time…
When on-line averaging is invoked, some signal amplitude excursions may need to be excluded during the averaging process. Artifact Rejection is a feature for just this purpose. When artifact rejection…
This application note describes how you can use the AcqKnowledge Media and Script capabilities together to facilitate the placement of markers in the physiological data record that correspond to events…
IMPORTANT SAFETY NOTE When using the STMISOC, STMISOD or STMISOE stimulus isolation adapter, it is possible to generate high peak-peak voltages. These voltages are potentially damaging, especially if the high…
This application note is concerned with the recording of real-time physiological data, from a human subject, during fMRI, using BIOPAC’s series of MRI Smart Amplifiers: ECG Electrocardiogram Amplifier for MRI…
This application note is concerned with the possibility of performing high-resolution ECG measurements in the MRI, during EPI. High-resolution ECG recordings are possible in the noisy MRI environment if signal…
To date it has been difficult to characterize the length-tension curve for a specific muscle. However, recent developments in the application of vibromyographic (VMG) technology to assess muscle effort permit…
Vibromyography (VMG) has distinct benefits over EMG in that the recordings much more accurately reflect absolute muscle effort up to 100% maximum voluntary contraction. Correspondingly, VMG can be used to…
VMG provides a convenient means for assessing rehabilitation progress following sports injuries such as ACL tears due to its ability to be utilized under conditions which reflect the multi-segment, closed-chain…
This application note lays out some generally recommended methods for recording data from subjects in the MRI or fMRI. BIOPAC Systems, Inc. (BIOPAC) designs systems that can be used to…
This application note discusses program flow control that is predicated on a user’s interaction with graphical interfaces, namely, buttons, scroll lists, and dialog boxes. The key idea is that the…
ECG waveforms can be “scrubbed” of MRI artifact with the judicious application of hardware and software tools. However, even with specialized hardware filtering (as with the MRI-specific amplifiers), some residual…
A wide range of meaningful information can be extracted from tri-axial acceleration measurements. This application note considers an example case of measurements associated with a subject who is using a…
A significant methodological concern in impedance cardiography is related to the impact of movement artifacts on recorded data. Ensemble averaging methods provide a strategy to remove these artifacts. Wearable and…
This application note examines a conventional equipment setup for metabolic measurements. The setup is exposed to a propane-based, combustion verification source that emulates subject’s steady-state consumption of oxygen and production…
Synchronized video coupled to simultaneously recorded physiological variables can help lead to better understanding of test results. AcqKnowledge 4.1 or above for Windows provides the ability to record a video…
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