Predicting muscle forces in the shoulder by constraining the inverse optimisation with EMG and a forward muscle model

The Dutch Shoulder and Elbow Model (DSEM) is a musculoskeletal model of the shoulder that can be used to predict internal shoulder loading (muscle forces, joint reaction forces, etc.). The DSEM uses an inverse optimisation method to predict muscle forces from net joint moments. In this study two new modes are presented that constrain the inverse...

Human motion sensor based on Functional Electrical Stimulation and Electromyography analysis

Functional Electrical Stimulation (FES) is used to help patient to recover or improve movement of their limbs after a spinal cord injury, a stroke or other neurological disorders effecting their motor system. The advance in technology in recent years has provided new possibilities for more accurate and better applications of FES. One of the...

Corticomuscular communication study by using current source density analysis

Corticomuscular communication during wrist motor tasks was investigated in this study. EEG signals from the sensorimotor cortex and EMG data from the reflexive carpi radialis and extensor carpi radialis muscles were recorded from five healthy subjects while performing visual-motor force tasks, with and without perturbation on the wrist....

Feed-forward torque control for plantar flexion support

Recent studies suggest that a reduction of the plantar-flexion muscle EMG can improve the efficiency of human locomotion. In this study, an attempt is made to reduce the maximal EMG of the gastrocnemius medialis and soleus by providing a feed-forward torque support around the ankle. The strategy only requires the ankle kinematics to define the...

Glove effects on forearm muscle activity in a windsurfing-like task

Windsurfers currently do not wear neoprene gloves when sailing in cold temperatures, as discomfort rapidly develops in the forearms when doing so. Lack of good protection against low temperatures means the hands get painfully cold and numb, limiting sailing time and pleasure. ElectroMyoGraphy (EMG) measurements were done on four forearm muscles...

Estimating ankle muscle parameters. Developing a tendon dynamics included neuromechanical muscle model and expanding the measurement protocols to improve ankle muscle parameter estimation accuracy

Current neuromechanical muscle models are unable to accurately estimate both passive and active muscle components. In this study it is investigated to increase the neuromechanical parameter estimations by using an input-rich measurement protocol and by expanding the ankle muscle model with tendon dynamics. New measurement protocols are developed...