Magnets and Blood Pressure Biomedical researchers in China have recently investigated the possibility of using magnets to alter a person’s blood pressure. They constructed a device that applies a weak, rotating magnetic field around the cerebral cortex. The researchers used a BIOPAC MP150 Data Acquisition System to obtain continuous blood pressure data. What they found […]

In Technology: Photoplethysmography with a Smart Phone Pulse transit time (PTT) recordings are widely used to make inferences about dynamics of vascular walls and blood pressure variations, parameters useful to the diagnosis of several respiratory conditions.  Chinese researchers have developed a method for noninvasive photoplethysmograhic imaging (PPGi) using the dual cameras of a common smartphone, […]

Humans, much like animals, separate themselves into different social hierarchies often associated by some specific sort of status signal. While animals may assign hierarchies strictly through physiological measures, the Biosocial Model states that speech is often the strongest form of status signaling for humans. BIOPAC user Allan Mazur recently was part of the research team […]