Estimation of Finger Joint Angles from sEMG Using a Neural Network Including Time Delay Factor and Recurrent Structure

Table 1

Target muscles and their main functions. On the flexion side of the forearm, there are certain muscles that relate to finger flexion. Note particularly that the muscles of the thumb are different from those of the other fingers so electrodes 1 and 2 specifically target the flexor pollicis longus to obtain information about the thumb.

Electrode index	Target muscle	Muscle's main function
1	Flexor pollicis longus	Thumb PIP and DIP flexion
2	Flexor pollicis longus	Thumb PIP and DIP flexion
3	Flexor digitorum superficialis	2nd 5th finger PIP flexion
4	Flexor digitorum profundus	2nd 5th finger DIP flexion