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New Citations | How Olfaction Affects Resting Brain Activity & More!

Smelling your Emotional State

Our sense of smell delivers important information to our brains, such as whether or not food is bad, or reminding us of a pleasant memory (crisp, fall air, anyone?). This fMRI-based study recorded PPG using a Photoplethysmograph Transducer for MRI connected to a PPG100C-MRI Amplifier. A differential pressure transducer continuously recorded variations in nostril airflow as various smells were pumped to subjects. Brain activity and PPG measurements recorded how subjects responded to different smells within the MRI environment. Read the full study: Sustained effects of pleasant and unpleasant smells on resting state brain activity (H. Carlson, J. Leitão, S. Delplanque, I. Cayeux, D. Sander, P. Vuilleumier)

Noninvasive Separation of Maternal and Fetal PPG in Utero

Knowing a fetus’ vital statistics can literally save lives, but current noninvasive PPG measurements of a fetus are not very accurate, due to interference from the mother’s PPG signal. Researchers recorded a reference PPG with the BIOPAC Human Pulse Oximetry System and devised a method to separate maternal and infant signals for clear identification. Read the full study: QRS triggered averaging for superimposed PPG separation (M. Schubert, F. Samann, T. Schanze)

Using Wearable Technology to triage a hemorrhaging injury

Establishing the triage order of multiple critically ill patients can save more lives when doctors work  efficiently. A recent study tracked vital signs and measured (theoretical) exsanguination using a variety of external and internally located measuring devices. BIOPAC’s TSD270A transreflectance transducer and veterinary pulse oximeter tracked animal PPG on porcine test subjects. Read the full study: Enabling the assessment of trauma-induced hemorrhage via smart wearable systems (J. Zia, J. Kimball, C. Rolfes, J. Hahn, O. Inan)

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NIRS Experiment License

fNIRS Lesson License

Add fNIRS Lessons to a C Series Imager Record NIRS measurements from the forehead and the forearm at two wavelengths, 730 nm for deoxy-Hb and 850 nm for oxy-Hb. Students embark on real-world NIRS research using a student-friendly approach in these four guided lessons covering nine experiments. COBI Modern makes NIRS experimentation easy for students […]

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New Citations | BIOPAC in EDA Research

Researchers utilize electrodermal activity (EDA) data in a wide array of protocols. These recent studies join thousands of BIOPAC citations for EDA and represent just a few of BIOPAC’s hardware options for wired, wireless, logged, or MRI protocols with reusable or disposable EDA accessories and AcqKnowledge software solutions for Automated EDA Analysis Routines and EDA Measurement Tools. Caffeine Delivery […]

EDA Guide Available

BIOPAC’s comprehensive EDA Guide provides an introduction to Electrodermal Activity (EDA or GSR) and details topics including: EDA Complex: SCL, SCR, tonic, phasic, specific SCR, non-specific SCR Participant Prep & Electrode Placement Data Recording tips Automated EDA Analysis Routines Digital input to Stim Events Stim-Response Analysis Derive Phasic EDA from Tonic Event-related EDA Analysis Locate […]

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