Fig. 6: Monitoring of proximal interphalangeal (PIP) joint angles in the index fingers during various activities.
a A photograph of the finger goniometer worn on the right index finger to track PIP joint motions during office work, captured over 1 hour. b The measured range of motion in the joint angles for three healthy subjects (left), and time-series data of measured angles of Subject 1 (right). c Long-term (7-hour) measurements of PIP joint angles in both the left and right index fingers, showing their range and time-series data. The time-series data consist of over 627,000 data points for each finger, and the range was estimated from these data. d An image of the device on the right index finger during baseball throwing, executed ten times. e The measured range of motion in joint angles (left), and time-series data of Subject 1 (right), with red triangle markers indicating release points. f An image of the device on the right hand while playing the piano. g Time-series data of measured angles and a music sheet from a specific section of the performance. Boxes in (b, c, e) represent the interquartile range (IQR) from the 25th to the 75th percentiles; whiskers extend to 1.5 times the IQR; and the midline within each box indicates the median of the dataset.
