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Functional Anatomy and Biomechanics
Published in Emeric Arus, Biomechanics of Human Motion, 2017
The middle region of the palm has the tendons of the flexor muscles, such as flexor digitorum superficialis, flexor digitorum profundus, and flexor pollicis longus. Let us describe succinctly these three muscles:
Which subject-related variables contribute to movement variability during a simulated repetitive and standardised occupational task? Recurrence quantification analysis of surface electromyographic signals
Published in Ergonomics, 2021
Clarisse Gaudez, Marc Mouzé-Amady
In the aim to improve controlled prosthetic devices, Ouyang et al. (2014) analysed four muscle activities (flexor carpi radialis, flexor carpi ulnaris, flexor pollicis longus, flexor digitorum profundus muscles) to identify different hand grips (with or without holding an object). They observed that DET and ENT values during the grasping without an object (empty hand) were lower than those with an object (an orange, a can, or a dumbbell) for the four flexor muscles. For these muscles, DET and ENT values when grasping an orange or a can were lower than those when grasping a dumbbell. Thus, the more force the grasp needed the more DET and ENT increased. These results were in agreement with ours. Indeed, when the clip insertion force was high (≥ 130 N), the DET and ENT values of FDS were higher. The same result was observed for EXT. Moreover, Ouyang et al. (2014) observed the same motor patterns as we did.
A review on the advancements in the field of upper limb prosthesis
Published in Journal of Medical Engineering & Technology, 2018
Nilanjan Das, Nikita Nagpal, Shailee Singh Bankura
The human arm consists of two parts – the lower part and the upper part. In the upper arm, two groups of muscles have to function in opposing pairs (flexor groups and extensor groups) to move the elbow joint [45]. Working on the theory that the use of the three types of electrodes that are used for the EMG recording will allow all hand and wrist functions to be controlled simultaneously, the following muscles were chosen; muscle controlling supination and muscle controlling pronation to give wrist rotation, flexor carpi ulnaris to give wrist flexion and extension, flexor pollicis longus and extensor pollicis to control a thumb, and flexor diaitorum sublimas and diaitorum communicus for finger opening and closing [46].
Performance Analysis of Artificial Neural Network for Hand Movement Detection from EMG Signals
Published in IETE Journal of Research, 2022
Angana Saikia, Sushmi Mazumdar, Nitin Sahai, Sudip Paul, Dinesh Bhatia
Twenty healthy subjects with an equal number of males and females were recruited for the study. The mean age for male subjects was 45 ± 10 years, weight: 55 ± 10 kg and the mean age for female subjects was 45 ± 10, weight: 55 ± 5. The inclusion criteria for the study were subjects between the age group 18–60 years without amputation. The subjects below 18 years and more than 60 years of age or with amputation were not considered for the study [17]. Written informed consent was obtained from each subject before participating in the study. The subject’s right arm was cleaned with cotton swab and alcohol to reduce skin impedance and acquisition of good quality signals. Disposable electrodes were placed on the subject’s selected muscles based on Seniam: European Recommendations for sEMG [18]. The subject(s) were asked to sit in a comfortable position before initiating data recording. The EMG signals were acquired through Ag/AgCl surface electrodes. We have employed two-channel EMG processor kit with the EMG DATAQ software. Further, the subject was asked to perform four different hand movements related to specific muscles required to perform those tasks [19]. They are: bicep bracii and triceps bracii muscle for flexion and extension of elbow, Carpi ulnaris and Carpi radialis muscle for flexion and extension of wrist, pronator tees and pronator quadrates muscle for pronation and supination of forearm, and flexor pollicis longus and extensor digitorium muscle for closing and opening of hand [20]. Two electrodes are placed on the muscle which is specific to its movement. The third electrode is a reference ground and is placed on a bony part where there is no signal recording to be performed. The recording unit is interfaced with a computer that converts the analog data’'s into digital form. Each movement of the upper limb is recorded for 2 min duration.