4451 On the loss of individual joint controllability and the organization of muscle synergies in the impaired arm following a stroke: A pilot study

OBJECTIVES/GOALS: Damage to the sensorimotor cortex areas or/and motor/sensory pathways after a stroke could lead the motor system to a loss of controllability for joints. We investigate the loss of individual joint controllability called a loss of individualization during arm movement, which would provide an insight into abnormal motor coordination. METHODS/STUDY POPULATION: We recruit 12 chronic stroke survivors with Fugl-Meyer score between 26 and 50. A robotic exoskeleton with minimum mechanical resistance is equipped to measure the movements of the shoulder, elbow and wrist joints, respectively. Surface EMGs on muscles related to the joints are recorded using 11 wireless pre-amplified electrodes. Participants are asked to move the shoulder, elbow, or wrist joint individually throughout their range of motion, without moving the other joints voluntarily. RESULTS/ANTICIPATED RESULTS: It would be expected that participants show more difficulty in individualization of the distal joint in comparison with the proximal joint. A reduced joint range of motion would be observed in a descending order of the wrist, elbow and shoulder. These results are in line with the proximal-to-distal gradient of motor deficits after a stroke. Intention of moving the distal joint would induce a greater deviation in the position of the proximal joint than that of the distal joint when moving the proximal joint. A non-negative matrix factorization algorithm would reveal a decreased number of muscle synergies in the groups with a loss of individuation in comparison with the groups with no loss. DISCUSSION/SIGNIFICANCE OF IMPACT: We demonstrate that a stroke leads to a lack of individual joint controllability, with a greater deficits on the distal joint, and that it is related to a decreased number of muscle synergies across the corresponding joints. CONFLICT OF INTEREST DESCRIPTION: N/A.

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Influence of Wrist Joint Position and Metacarpophalangeal Joint Range of Motion on Extensor Digitorum Communis (edc) Activity: An Electromyographic Study

The British Journal of Hand Therapy ◽

10.1177/175899830601100102 ◽

2006 ◽

Vol 11 (1) ◽

pp. 10-14 ◽

Cited By ~ 4

Author(s):

Dikaios Sakellariou ◽

Yuji Sawada ◽

Sadako Tsubota

Keyword(s):

Range Of Motion ◽

Wrist Joint ◽

Metacarpophalangeal Joint ◽

Extensor Digitorum ◽

Joint Position ◽

Extensor Digitorum Communis ◽

Joint Range Of Motion ◽

Joint Range

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Posterior Interosseous Neurectomy Alternative for Treating Chronic Wrist Pain

Journal of Wrist Surgery ◽

10.1055/s-0039-1677740 ◽

2019 ◽

Vol 08 (03) ◽

pp. 198-201 ◽

Cited By ~ 3

Author(s):

Ashraf M. Abdelaziz ◽

Wael Aldahshan ◽

Faisal Ahmed Hashem El-Sherief ◽

Yaser El Sayed Hassan Wahd ◽

Hany Abdel Gawwad Soliman

Keyword(s):

Pain Relief ◽

Range Of Motion ◽

Grip Strength ◽

Wrist Joint ◽

Wrist Pain ◽

Joint Range Of Motion ◽

The Difference ◽

Joint Range ◽

Wrist Denervation ◽

Chronic Wrist Pain

Background Wrist denervation is one of the several available options for treating chronic wrist pain; partial wrist denervation performed through a single dorsal incision by resecting the distal posterior interosseous nerve provides good outcomes. Questions/Purposes This study evaluated the results of posterior interosseous neurectomy (PIN) in patients with chronic wrist pain secondary to scaphoid nonunion advanced collapse (SNAC) and scapholunate advanced collapse (SLAC). Methods In total, 30 wrists obtained from 28 patients (25 males, 3 females) were assessed. The dominant hands of 25 (right-handed) patients, nondominant hands of 5, and both hands of 2 were considered. The average age at the time of surgery was 35 (range: 19–50) years, and the average follow-up duration was 18 (range: 12–30) months. Fifteen and 13 patients had wrists with SNAC and SLAC, respectively, and all of those underwent PIN performed through the dorsal approach. The pre- and postoperative range of motion, grip strength, and pain relief percentage were recorded for all the 30 wrists. Results The average postoperative Disabilities of the Arm, Shoulder and Hand score was 30 (range: 20–80), and the difference between the pre- and postoperative scores was statistically significant. Ninety percent of the patients were satisfied with the results of PIN and reported improvement in grip strength and pain relief. Conclusions Thus, PIN may be an effective surgical technique for wrist reconstruction. Clinical Relevance To help patients challenge pain and maintain their wrist joint range of motion.

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Development of Rehabilitation System for Upper Limbs: PLEMO-P3 System for Hemiplegic Subject (Motor Function Test for Assessment and Training, and Research for Development of Practical Type)

Journal of Robotics and Mechatronics ◽

10.20965/jrm.2013.p0136 ◽

2013 ◽

Vol 25 (1) ◽

pp. 136-144 ◽

Cited By ~ 4

Author(s):

Takuya Ozawa ◽

◽

Junji Furusho ◽

Takehito Kikuchi ◽

Kazuki Fukushima ◽

...

Keyword(s):

Range Of Motion ◽

Wrist Joint ◽

Reaction Force ◽

Motion Sensor ◽

Training Methods ◽

Upper Limbs ◽

Joint Range Of Motion ◽

Rehabilitation System ◽

Joint Range ◽

And Training

We have developed PLEMO-P3, a rehabilitation system for the upper limbs that utilizes ER brakes as torque generators and is a passive haptic device. To detect abnormalities in patients, we developed a new sensing device and installed it on the grip of the PLEMO-P3. In this paper, we compare several kinds of information from the sensor system (grasping force, reaction force against the working plane, and wrist joint range) and traditional stroke assessment (BRS, FMA and STEF). We establish effective assessment and training methods with PLEMO-P3, finding the effects of training and a strong correlation between them. We suggest a training method with PLEMO depending on the results of clinical assessment. We confirmed the correlation of the working plane reaction force and wrist joint range of motion and were able to detect synergy movement within the motion sensor wrist joint range. This correlation has been understood that it will equip it only with the wrist joint range of motion sensor in PLEMO-P4, a machine for practical use.1 1. This paper is the full translation from the transactions of JSME, Series C, Vol.76, No.762, pp. 323-330, 2010.

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Reliability of Using Kinovea Program in Measuring Dominant Wrist Joint Range of Motion

Trends in Applied Sciences Research ◽

10.3923/tasr.2015.224.230 ◽

2015 ◽

Vol 10 (4) ◽

pp. 224-230 ◽

Cited By ~ 8

Author(s):

Mohammad F. Ali ◽

Reham M. Abd El-Raheem ◽

Ragia M. Kamel

Keyword(s):

Range Of Motion ◽

Wrist Joint ◽

Joint Range Of Motion ◽

Joint Range

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Reliability of Ankle Goniometric Measurements

Journal of the American Podiatric Medical Association ◽

10.7547/0950564 ◽

2005 ◽

Vol 95 (6) ◽

pp. 564-572 ◽

Cited By ~ 68

Author(s):

RobRoy L. Martin ◽

Thomas G. McPoil

Keyword(s):

Range Of Motion ◽

Interrater Reliability ◽

Ankle Dorsiflexion ◽

Ample Evidence ◽

Medline Search ◽

Joint Range Of Motion ◽

Study Population ◽

Motion Measurements ◽

Goniometric Measurements ◽

Joint Range

This article reviews the existing range-of-motion measurement literature related to ankle dorsiflexion and plantarflexion to determine whether the reliability of ankle range-of-motion measurements can be defined, how the characteristics of the study population or clinician affect reliability, and the level of responsiveness for these measures. A MEDLINE search was performed through February 2004, and 11 articles met the inclusion criteria established for this review. Ample evidence was found for intrarater reliability for ankle dorsiflexion and plantarflexion range of motion. Although some evidence for interrater reliability of dorsiflexion was found, little evidence for interrater reliability of plantarflexion range of motion was uncovered. On the basis of the current literature, the responsiveness of ankle joint range-of-motion measurements is uncertain and requires further studies using patient populations. (J Am Podiatr Med Assoc 95(6): 564–572, 2005)

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