Leg Muscle Activation Patterns of Sit-to-Stand Movement in Stroke Patients

Background. Arm support to help compensate for the effects of gravity may improve functional use of the shoulder and elbow during therapy after stroke, but gravity compensation may alter motor control. Objective. To obtain quantitative information on how gravity compensation influences muscle activation patterns during functional, 3-dimensional reaching movements. Methods. Eight patients with mild hemiparesis performed 2 sets of repeated reach and retrieval movements, with and without unloading the arm, using a device that acted at the elbow and forearm to compensate for gravity. Electromyographic (EMG) patterns of 6 upper extremity muscles were compared during elbow and shoulder joint excursions with and without gravity compensation. Results. Movement performance was similar with and without gravity compensation. Smooth rectified EMG (SRE) values were decreased from 25% to 50% during movements with gravity compensation in 5 out of 6 muscles. The variation of SRE values across movement phases did not differ across conditions. Conclusions. Gravity compensation did not affect general patterns of muscle activation in this sample of stroke patients, probably since they had adequate function to complete the task without arm support. Gravity compensation did facilitate active arm movement excursions without impairing motor control. Gravity compensation may be a valuable modality in conventional or robot-aided therapy to increase the intensity of training for mildly impaired patients.

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Differences in Muscle Activation Patterns during Sit to Stand Task among Subjects with and without Intellectual Disability

BioMed Research International ◽

10.1155/2013/173148 ◽

2013 ◽

Vol 2013 ◽

pp. 1-7 ◽

Cited By ~ 8

Author(s):

Antonio I. Cuesta-Vargas ◽

Manuel González-Sánchez

Keyword(s):

Intellectual Disability ◽

Muscle Activity ◽

Muscle Activation ◽

Cross Sectional Study ◽

Lower Limbs ◽

Cross Sectional ◽

Activation Patterns ◽

Muscle Activation Patterns ◽

Sit To Stand ◽

Basic Features

The aim of this study is to analyse the differences in muscle activity between subjects who have intellectual disability and healthy subjects when they make the transition from sitting to standing positions. A cross-sectional study. A group of adults was divided into two subgroups: with and without intellectual disability (ID). The means of the basic features in both groups were 22.13 and 22.83 for age, 66.38 and 67.67 for weight, and 173.38 and 174.33 for height, for the ID () and without ID () groups, respectively. Each subject performed three sets of five repetitions during which, starting from sitting, they had to get up and sit on the chair. The recording of muscle activity was performed using surface electromyography taking the measures of muscle activity of different muscles of the lower limbs. The results showed differences in the pattern of muscle activity between groups during sitting to standing movement.

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Differences in lower limb muscle activation patterns during Sit to Stand Task for different heel heights

2017 39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) ◽

10.1109/embc.2017.8037361 ◽

2017 ◽

Author(s):

Ganesh R. Naik ◽

Manisha Pratihast ◽

Rifai Chai ◽

Ahmed Al-Ani ◽

Amit Acharyya ◽

...

Keyword(s):

Lower Limb ◽

Muscle Activation ◽

Lower Limb Muscle ◽

Limb Muscle ◽

Activation Patterns ◽

Muscle Activation Patterns ◽

Sit To Stand

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A biomechanical model to estimate corrective changes in muscle activation patterns for stroke patients

Journal of Biomechanics ◽

10.1016/j.jbiomech.2008.07.015 ◽

2008 ◽

Vol 41 (14) ◽

pp. 3097-3100 ◽

Cited By ~ 8

Author(s):

Qi Shao ◽

Thomas S. Buchanan

Keyword(s):

Muscle Activation ◽

Biomechanical Model ◽

Stroke Patients ◽

Activation Patterns ◽

Muscle Activation Patterns

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Estimation of Corrective Changes in Muscle Activation Patterns for Stroke Patients During FES Intervention

ASME 2007 Summer Bioengineering Conference ◽

10.1115/sbc2007-176051 ◽

2007 ◽

Author(s):

Qi Shao ◽

Daniel N. Bassett ◽

Kurt Manal ◽

Thomas S. Buchanan

Keyword(s):

Electrical Stimulation ◽

Muscle Activation ◽

Control Strategies ◽

Biomechanical Model ◽

Stroke Patients ◽

Activation Patterns ◽

Know How ◽

Muscle Activation Patterns ◽

Person Following ◽

Human Movements

Functional electrical stimulation (FES) has been used in the rehabilitation of stroke patients. It is important to know how to stimulate the muscles when using FES. Many control methods have been used to derive the required electrical stimulation patterns. However, these models were not developed based on biomechanical model of human neuromuscular system, thus can not account for sophisticated neurological control strategies during human movements. Based on our developed electromyography (EMG) driven model, we have created a biomechanical model to estimate the corrective increases in muscle activation patterns needed for a person following stroke to walk with an improved normal gait.

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