Videos

The movies listed below display the electrical activity on the skin under an electrode grid placed over a muscle.

Some movies show the instantaneous distribution of electric voltage (detected at 2048 frames/s but presented at a lower rate) or averaged (average rectified value over 0.5 s epochs, ARV, detected and presented at 2 frames/s). Presentation is in false color images (2D, red=positive or higher values, blue=negative or lower values) or in 3D plots (signal intensity versus the x and y coordinates under the grid). All images are interpolated.

List of videos

  1. Upper/middle trapezius muscle: instantaneous signal. Slight shoulder elevation.
  2. Vastus medialis muscle: instantaneous signal. Slight extension of the leg
  3. Tibialis anterior muscle: instantaneous signals. Slight dorsiflexion of the foot
  4. Medial and lateral gastrocnemius muscle: instantaneous signal. Quiet standing
  5. Upper trapezius muscle: average rectified value (ARV). Slight shoulder elevation.
  6. Upper and middle trapezius during writing at a keyboard without forearm support
  7. Upper and middle trapezius during writing at a keyboard with the forearms resting on the desk
  8. Upper and middle trapezius while using the mouse without forearm support
  9. Upper and middle trapezius while using the mouse with the forearms resting on the desk
  10. Biceps brachii: concentric and eccentric contraction 1
  11. Finger extension
  12. Lumbar erector spinae during quiet standing
  13. Left lumbar erector spinae during trunk flexion
  14. Tibialis anterior and peroneus longus muscles during dorsal flexion or eversion of the foot
  15. Long bows on string 1 and 4 of a violin. Upper, middle and lower right trapezius; upper and middle left trapezius; right and left lumbar erector spinae
  16. Long bows on string 1 and 4 of a cello. Upper, middle and lower right trapezius; right and left lumbar erector spinae.
  17. Right trapezius of a flute player
  18. Right and left trapezius of a violin player in concert. 1 of 2
  19. Right and left trapezius of a violin player in concert. 2 of 2
  20. Controlling the speed of a toy car on a Polistil racing track
  21. Biceps brachii: concentric and eccentric contraction 2
  22. Activity of the back muscles during rowing
  23. Pre-recorded sounds controlled by muscle activity
  24. Rehabilitation Robotics Demo
  25. Gastrocnemius muscle during quiet standing
  26. Computer simulation of the generation, propagation and extinction of a single fiber monopolar action potential