Detecting Reach to Grasp Activities using Motion and Muscle Activation Data

2018 ◽  
Author(s):  
Nathaniel Hauser ◽  
Eric Wade
Keyword(s):  
Muscle Activation ◽  
Reach To Grasp ◽  
Activation Data

scholarly journals The role of hyoid muscles in biotremor production in Chamaeleo calyptratus

2020 ◽  
Vol 223 (22) ◽  
pp. jeb227603
Author(s):  
Samuel M. Tegge ◽  
Christopher V. Anderson ◽  
Michael E. Smith ◽  
Steve Huskey
Keyword(s):  
Body Temperature ◽  
Muscle Activation ◽  
Mixed Effect ◽  
Anatomical Structures ◽  
Levator Scapulae ◽  
Effect Regression ◽  
Activation Data ◽  
Chamaeleo Calyptratus ◽  
Mixed Effect Regression Model

ABSTRACTThe production of biotremors has been described in veiled chameleons (Chamaeleo calyptratus), but the mechanism by which they are produced is unknown. We gathered muscle activation data via electromyography (EMG), with simultaneous recordings of biotremors using an accelerometer, to test for the role of hyoid muscles in biotremor production. We recorded a mean biotremor frequency of 150.87 Hz for females and 136.01 Hz for males. The durations of activity and the latencies to onset and offset for the M. sternohyoideus profundus (SP), M. sternohyoideus superficialis (SS), Mm. mandibulohyoideus (MH) and M. levator scapulae (LS) were all significantly correlated with biotremor durations and biotremor onset and offset, respectively. Linear mixed-effect regression model comparisons of biotremor duration indicated that models containing either the MH and/or the SP and LS account for the most variation in biotremor duration. Twitch times for the SP (100 ms) and the SS (132 ms) at field active body temperature, however, were individually too slow to produce the biotremors at the observed frequency without alteration after production by other anatomical structures. These results implicate the SP, SS, MH and LS in the production of biotremors, but the exact mechanism of production requires further study.

Effect of Prior Mental or Physical Fatigue on the Biomechanical Response During a Lifting Task

2016 ◽  
Vol 60 (1) ◽  
pp. 997-998
Author(s):  
Susan E. Kotowski ◽  
Joseph Niehaus ◽  
Alyssa Ofat ◽  
Michael Presnell ◽  
Alena Regelski ◽  
...  
Keyword(s):  
Muscle Activity ◽  
Muscle Activation ◽  
Perceived Exertion ◽  
Rating Of Perceived Exertion ◽  
Physical Fatigue ◽  
Repetitive Lifting ◽  
Biomechanical Response ◽  
Activation Data ◽  
Study Participants ◽  
Lifting Task

Repetitive lifting is a requirement in many occupations and often leads to prevalent and costly back injuries. What is unknown is how fatigue, whether mental or physical, occurring before the primary lifting task impacts the biomechanical response during the task. Study participants completed three lifting tasks with prior mental fatigue (Stroop test), prior physical fatigue (running on a treadmill), or no prior fatigue. Electromyography (EMG) was used to measure muscle activity and fatigue, and Borg’s Rating of Perceived Exertion (RPE) was also assessed. Muscle activation data and RPE data indicated that both prior mental and physical fatigue increases muscle activation and perceived exertion.

scholarly journals Muscle activation patterns in acceleration-based phases during reach-to-grasp movement

2016 ◽  
Vol 28 (11) ◽  
pp. 3105-3111 ◽  
Author(s):  
Keisuke Tokuda ◽  
Bumsuk Lee ◽  
Yasufumi Shiihara ◽  
Kazuhiro Takahashi ◽  
Naoki Wada ◽  
...  
Keyword(s):  
Muscle Activation ◽  
Reach To Grasp ◽  
Activation Patterns ◽  
Muscle Activation Patterns

Muscle Synergies Based on a Biomechanical Biaxial Isometric Shoulder Model Minimizing Fatigue

2010 ◽  
Author(s):  
Mohamadreza Nassajian Moghadam ◽  
Kamiar Aminian ◽  
Mohsen Asghari ◽  
Mohammad Parnianpour
Keyword(s):  
Shoulder Joint ◽  
Degrees Of Freedom ◽  
Muscle Activation ◽  
Glenohumeral Joint ◽  
Nonnegative Matrix ◽  
Factorization Method ◽  
Muscle Synergy ◽  
Muscle Synergies ◽  
Specific Direction ◽  
Activation Data

In this study we utilize the concept of synergy formation as a simplifying control strategy to manage the high number of degrees of freedom presented in the maintenance of the posture of the shoulder joint. We address how to find the muscle synergy recruitment map to the biomechanical demands (biaxial external torque) during an isometric shoulder task. We use a numerical optimization based shoulder model to obtain muscle activation levels when a biaxial external isometric torque is exposed at the shoulder glenohumeral joint. In the numerical simulations, different shoulder torque vectors parallel to the horizontal plane are considered. For each selected direction for the torque, the resulting muscle activation data are calculated and then used for grouping muscles in some fixed element synergies by nonnegative matrix factorization method Next, the muscle synergies are converted from activation level to the torque space to see how muscle synergy recruitment addresses the torque production in a specific direction at the shoulder joint. The results confirmed our expectation that the few dominant synergies are sufficient to address the torque vectors in directions which coincide to the basic vectors of torque space, such that each muscle contributed to more than one synergy.

scholarly journals Gait Analysis Comparing Kinematic, Kinetic, and Muscle Activation Data of Modern and Conventional Total Knee Arthroplasty

2020 ◽  
Vol 6 (3) ◽  
pp. 338-342
Author(s):  
Kojiro Hyodo ◽  
Akihiro Kanamori ◽  
Hideki Kadone ◽  
Tatsuya Takahashi ◽  
Masaya Kajiwara ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Gait Analysis ◽  
Knee Arthroplasty ◽  
Muscle Activation ◽  
Activation Data ◽  
Total Knee ◽  
Conventional Total Knee Arthroplasty

scholarly journals Phase-dependent deficits during reach-to-grasp after human spinal cord injury

2018 ◽  
Vol 119 (1) ◽  
pp. 251-261 ◽  
Author(s):  
Yuming Lei ◽  
Monica A. Perez
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Muscle Activation ◽  
Cervical Spinal Cord ◽  
Sensory Function ◽  
Movement Duration ◽  
Functional Impairments ◽  
Reach To Grasp ◽  
Cord Injury ◽  
Opening And Closing

Most cervical spinal cord injuries result in asymmetrical functional impairments in hand and arm function. However, the extent to which reach-to-grasp movements are affected in humans with incomplete cervical spinal cord injury (SCI) remains poorly understood. Using kinematics and electromyographic (EMG) recordings in hand and arm muscles we studied the different phases of unilateral self-paced reach-to-grasp movements (arm acceleration, hand opening and closing) to a small cylinder in the more and less affected arms of individuals with cervical SCI and in age-matched controls. We found that SCI subjects showed prolonged movement duration in both arms during arm acceleration, and hand opening and closing compared with controls. Notably, the more affected arm showed an additional increase in movement duration at the time to close the hand compared with the less affected arm. Also, the time at which the index finger and thumb contacted the object and the variability of finger movement trajectory were increased in the more compared with the less affected arm of SCI participants. Participants with prolonged movement duration during hand closing were those with more pronounced deficits in sensory function. The muscle activation ratio between the first dorsal interosseous and abductor pollicis brevis muscles decreased during hand closing in the more compared with the less affected arm of SCI participants. Our results suggest that deficits in movement kinematics during reach-to-grasp movements are more pronounced at the time to close the hand in the more affected arm of SCI participants, likely related to deficits in EMG muscle activation and sensory function. NEW & NOTEWORTHY Humans with cervical spinal cord injury usually present asymmetrical functional impairments in hand and arm function. Here, we demonstrate for the first time that deficits in movement kinematics during reaching and grasping movements are more pronounced at the time to close the hand in the more affected arm of spinal cord injury. We suggest that this is in part related to deficits in muscle activation ratios between hand muscles and a decrease in sensory function.

Do Corticomotoneuronal Cells Predict Target Muscle EMG Activity?

2008 ◽  
Vol 99 (3) ◽  
pp. 1169-1986 ◽  
Author(s):  
D. M. Griffin ◽  
H. M. Hudson ◽  
A. Belhaj-Saïf ◽  
B. J. McKiernan ◽  
P. D. Cheney
Keyword(s):  
Firing Rate ◽  
Cortical Neurons ◽  
Muscle Activation ◽  
Cell Activation ◽  
Primary Motor Cortex ◽  
Pearson Correlation ◽  
Cortical Cell ◽  
Emg Activity ◽  
Reach To Grasp ◽  
Muscle Activation Patterns

Data from two rhesus macaques were used to investigate the pattern of cortical cell activation during reach-to-grasp movements in relation to the corresponding activation pattern of the cell's facilitated target muscles. The presence of postspike facilitation (PSpF) in spike-triggered averages (SpTAs) of electromyographic (EMG) activity was used to identify cortical neurons with excitatory synaptic linkages with motoneurons. EMG activity from 22 to 24 muscles of the forelimb was recorded together with the activity of M1 cortical neurons. The extent of covariation was characterized by 1) identifying the task segment containing the cell and target muscle activity peaks, 2) quantifying the timing and overlap between corticomotoneuronal (CM) cell and EMG peaks, and 3) applying Pearson correlation analysis to plots of CM cell firing rate versus EMG activity of the cell's facilitated muscles. At least one firing rate peak, for nearly all (95%) CM cells tested, matched a corresponding peak in the EMG activity of the cell's target muscles. Although some individual CM cells had very strong correlations with target muscles, overall, substantial disparities were common. We also investigated correlations for ensembles of CM cells sharing the same target muscle. The ensemble population activity of even a small number of CM cells influencing the same target muscle produced a relatively good match ( r ≥ 0.8) to target muscle EMG activity. Our results provide evidence in support of the notion that corticomotoneuronal output from primary motor cortex encodes movement in a framework of muscle-based parameters, specifically muscle-activation patterns as reflected in EMG activity.

scholarly journals Combined surface electromyography, near-infrared spectroscopy and acceleration recordings of muscle contraction: The effect of motion

2017 ◽  
Vol 10 (02) ◽  
pp. 1650056 ◽  
Author(s):  
Krista Kauppi ◽  
Vesa Korhonen ◽  
Hany Ferdinando ◽  
Mika Kallio ◽  
Teemu Myllylä
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Surface Electromyography ◽  
Muscle Activation ◽  
Near Infrared ◽  
Biceps Brachii ◽  
Muscle Metabolism ◽  
Specific Information ◽  
Current State ◽  
Activation Data

Noninvasive techniques, surface electromyography (sEMG) in particular, are being increasingly employed for assessing muscle activity. In these studies, local oxygen consumption and muscle metabolism are of great interest. Measurements can be performed noninvasively using optics-based methods such as near-infrared spectroscopy (NIRS). By combining energy consumption data provided by NIRS with muscle level activation data from sEMG, we may gain an insight into the metabolic and functional characteristics of muscle tissue. However, muscle motion may induce artifacts into EMG and NIRS. Thus, the inclusion of simultaneous motion measurements using accelerometers (ACMs) enhances possibilities to perceive the effects of motion on NIRS and EMG signals. This paper reviews the current state of noninvasive EMG and NIRS-based methods used to study muscle function. In addition, we built a combined sEMG/NIRS/ACM sensor to perform simultaneous measurements for static and dynamic exercises of a biceps brachii muscle. Further, we discuss the effect of muscle motion in response of NIRS and EMG when measured noninvasively. Based on our preliminary studies, both NIRS and EMG supply specific information on muscle activation, but their signal responses also showed similarities with acceleration signals which, in this case, were supposed to be solely sensitive to motions.

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