Figure 1
From: Genetic variation regulates opioid-induced respiratory depression in mice
Simultaneous piezoelectric floor sensor and plethysmography signals are compared for extracting mean respiration rates over short-time intervals. (A) Example of low activity, sleep-like segment with piezoelectric signal generated from thorax motion with a strict correspondence to the changing air pressure driving the plethysmography signal. (B) Example of moderate body motion signal (head motion, slow walking) reducing the dominance from the thorax motion on the piezoelectric sensor.
