scholarly journals Continuous Decoding of Daily-Life Hand Movements from Forearm Muscle Activity for Enhanced Myoelectric Control of Hand Prostheses

2021 ◽  
Author(s):  
Alessandro Salatiello ◽  
Martin A. Giese
Keyword(s):  
Muscle Activity ◽  
Daily Life ◽  
Myoelectric Control ◽  
Hand Movements ◽  
Forearm Muscle

scholarly journals Back-Support Exoskeleton Control Strategy for Pulling Activities: Design and Preliminary Evaluation

Designs ◽  
2021 ◽  
Vol 5 (3) ◽  
pp. 39
Author(s):  
Maria Lazzaroni ◽  
Tommaso Poliero ◽  
Matteo Sposito ◽  
Stefano Toxiri ◽  
Darwin G. Caldwell ◽  
...  
Keyword(s):  
Control Strategy ◽  
Muscle Activity ◽  
Material Handling ◽  
Ease Of Use ◽  
Biomechanical Analysis ◽  
Perceived Support ◽  
Preliminary Evaluation ◽  
Subjective Measurements ◽  
Spinal Muscles ◽  
Forearm Muscle

The execution of manual material handling activities in the workplace exposes workers to large lumbar loads that increase the risk of musculoskeletal disorders and low back pain. In particular, the redesign of the workplace is making the execution of pulling activities more common, as an alternative to lifting and carrying tasks. The biomechanical analysis of the task revealed a substantial activation of the spinal muscles. This suggests that the user may benefit from the assistance of a back-support exoskeleton that reduces the spinal muscle activity and their contribution to lumbar compression. This work addresses this challenge by exploiting the versatility of an active back-support exoskeleton. A control strategy was specifically designed for assisting pulling that modulates the assistive torques using the forearm muscle activity. These torques are expected to adapt to the user’s assistance needs and the pulled object mass, as forearm muscle activity is considered an indicator of grip strength. We devised laboratory experiments to assess the feasibility and effectiveness of the proposed strategy. We found that, for the majority of the subjects, back muscle activity reductions were associated with the exoskeleton use. Furthermore, subjective measurements reveal advantages in terms of perceived support, comfort, ease of use, and intuitiveness.

scholarly journals Muscle Activity and Inactivity Periods during Normal Daily Life

PLoS ONE ◽  
2013 ◽  
Vol 8 (1) ◽  
pp. e52228 ◽  
Author(s):  
Olli Tikkanen ◽  
Piia Haakana ◽  
Arto J. Pesola ◽  
Keijo Häkkinen ◽  
Timo Rantalainen ◽  
...  
Keyword(s):  
Muscle Activity ◽  
Daily Life

scholarly journals From maturity to old age: tasks of daily life require a different muscle use in horses

2014 ◽  
Vol 10 (2) ◽  
pp. 75-88 ◽  
Author(s):  
R.R. Zsoldos ◽  
B. Krüger ◽  
T.F. Licka
Keyword(s):  
Life Expectancy ◽  
Muscle Activity ◽  
Dynamic Time Warping ◽  
Muscle Activation ◽  
Daily Life ◽  
Age Groups ◽  
Time Warping ◽  
Neck Extension ◽  
Neck Position ◽  
Dynamic Time

In vertebrates ageing is characterised by reduced viscoelasticity of the ligamentous and tendineous structures and fibre changes in muscle. Also, some vertebral joint degeneration develops with ageing. The aim of this study was to apply dynamic time warping to compare the temporal characteristics of the surface electromyography (sEMG) data and to illustrate the differences in the pattern of muscle use during tasks of daily life in old and mature horses. In vivo kinematics (24 skin markers) and sEMG measurements of neck extensors and flexors were taken in five mature horses (aged 10±2 years, half of mean life expectancy) and five old horses (aged 25±5 years, older than the mean life expectancy). All horses had the same level of activity in the 12 months prior to the measurement. Tasks measured were neck flexion and neck extension as well as neutral neck position. Muscle activation, minimum and maximum muscle activation were collected. Quartiles of muscle activity based on the maximum observed activity of each muscle were calculated to document the relative increase of activity level during the task. Kinematics as well as overall muscle activity patterns were similar across horses and age groups. However, in the neutral position old horses showed increased extensor activity compared to mature horses, indicating that old equine muscle requires more activity to counteract gravity. Dynamic time warping specified optimal temporal alignments of time series, and different temporal performances were identified. The age groups differed during the flexion task, while neck extension and neutral neck position were more similar. The results of this study show that even in the second half of life and in the absence of muscle disuse the muscular strategy employed by horses continues to be adapted.

scholarly journals Hand movements classification for myoelectric control system using adaptive resonance theory

2015 ◽  
Vol 39 (1) ◽  
pp. 85-102 ◽  
Author(s):  
H. Jahani Fariman ◽  
Siti A. Ahmad ◽  
M. Hamiruce Marhaban ◽  
M. Alijan Ghasab ◽  
Paul H. Chappell
Keyword(s):  
Control System ◽  
Myoelectric Control ◽  
Adaptive Resonance Theory ◽  
Hand Movements ◽  
Resonance Theory ◽  
Adaptive Resonance

The Effects of Gloves on Grip Strength and Muscle Activity

1988 ◽  
Vol 32 (11) ◽  
pp. 647-650 ◽  
Author(s):  
L.R. Sudhakar ◽  
R.W. Schoenmarklin ◽  
S.A. Lavender ◽  
W.S. Marras
Keyword(s):  
Grip Strength ◽  
Muscle Activity ◽  
Muscle Force ◽  
Force Measurement ◽  
Significant Difference ◽  
Selection For ◽  
Forearm Muscle

The focus of this research was to investigate how grip strength and forearm muscle force were affected by two types of gloves, rubber and leather. Grip strength was significantly less in the two gloved conditions than in a barehanded condition. However, EMG analysis of muscle activity revealed no significant difference in muscle activity across the gloved and barehanded conditions, indicating that subjects generated maximal exertions in all conditions. Therefore, a certain amount of muscle force is lost in the hand-glove interface while producing maximal grip forces in the gloved conditions. Internal muscle force measurement could thus be used to aid in glove selection for submaximal tasks in industry.

Muscle activity during daily life in the older people

2015 ◽  
Vol 28 (4) ◽  
pp. 713-720 ◽  
Author(s):  
Olli Tikkanen ◽  
Sarianna Sipilä ◽  
Anna-Stina Kuula ◽  
Arto Pesola ◽  
Piia Haakana ◽  
...  
Keyword(s):  
Older People ◽  
Muscle Activity ◽  
Daily Life

scholarly journals Association between balance of masticatory muscle activity during usual daily life and transverse craniofacial morphology or tooth contact area in patients with transverse jaw deformity: An electromyographic evaluation

2015 ◽  
Vol 3 (1) ◽  
pp. 1-7
Author(s):  
Mohammed Saifuddin ◽  
Shahana Begum ◽  
Hiroshi M Ueda ◽  
Keisuke Miyamoto ◽  
Kazuo Tanne
Keyword(s):  
Contact Area ◽  
Muscle Activity ◽  
Daily Life ◽  
Temporomandibular Disorder ◽  
Craniofacial Morphology ◽  
Recording Device ◽  
Masticatory Muscle ◽  
Tooth Contact ◽  
Temporal Muscle ◽  
Masticatory Muscle Activity

Introduction: It is considered now-a-days that patients with transverse craniofacial deformity might have differences in masticatory muscle activity between both sides; and as masticatory muscle activity takes place throughout the usual daily life; therefore, it might have some relation with the transverse craniofacial morphology. The present study was carried out to find out any association between balance of masticatory  muscle activity during usual daily life and transverse craniofacial morphology or tooth contact area in patients with transverse jaw deformity.Subjects and Methods: All the controls and patients for the study were selected from our staffs and patients coming to Orthodontic Clinic, Hiroshima University Dental Hospital, respectively. Thirteen males and two females (mean and s.d. of ages: 28.6 ± 1.9 years) served as the controls. They had Angle’s Class I molar relationship, no severe malocclusion, no complaints of temporomandibular disorder (TMD).The patient group was consisted of 10 males and five females (mean and s.d. of ages: 19.9 ± 5.3 years) with lateral shift of the mandible. They had malocclusion such as cross-bite and severe crowding, but no complaints of TMD. Portable digital EMG recording device were used to record the EMG from the bilateral masster and anterior temporal muscles. The diurnal recording was carried out for consecutive 142 minutes and divided into two periods of usual daytime and mealtime for analysis. After the diurnal recording, the subjects were allowed to go back home with the electrodes in position and then nocturnal EMG recording was performed again at night with the usual sleeping posture for 142 minutes. Posteroanterior cephalometric analysis and tooth contact area were measured for all the subjects.Result: No significant correlations were found for both the muscles neither with transverse craniofacial morphology nor with the tooth contact area for all the three periods of usual daily life, although a significant correlation was detected between the A-B distance and AI of the anterior temporal muscle during usual daytime.Conclusion: It is suggested that masticatory muscle activity during usual daily life in patients with transverse craniofacial deformity may not be related only to such factors as skeletal deformity or tooth contact area but governed by other important factors like occlusal interference, premature contacts, instability and so on.Ban J Orthod & Dentofac Orthop, October 2012; Vol-3, No.1

Sign in / Sign up

Export Citation Format

Share Document