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The purpose of this study is to examine the effect of - both constant as intermittent - local application of deep pressure on muscle activity and general relaxation in persons with hypertonia following stroke.
This study will be carried out in 20 persons with hypertonia following stroke. There will be one single test occasion, during which 6 test trials will be performed in random order. Deep pressure will be applied by means of a Johnstone air splint, that will be (1) not inflated, (2) inflated constantly, or (3) inflated intermittently. Each of these 3 inflation conditions will be performed twice, i.e. with and without a non-hemiplegic arm movement (triggering hypertonia at hemiplegic side).
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| uninflated - rest | Sham Comparator | splint around the arm is not inflated both arms are in rest during the entire trial |
|
| uninflated - triggered | Sham Comparator | splint around the arm is not inflated 5x flexion and extension with the contralateral arm (with weight of 5kg in the hands) |
|
| constantly inflated - rest | Active Comparator | splint around the arm is constantly inflated both arms are in rest during the entire trial |
|
| constantly inflated - triggered | Active Comparator | splint around the arm is constantly inflated 5x flexion and extension with the contralateral arm (with weight of 5kg in the hands) |
|
| intermittently inflated - rest | Experimental | splint around the arm is intermittently inflated both arms are in rest during the entire trial |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| constant deep pressure applied by an air splint | Device | inflation of the Johnstone air splint gives a constant local deep pression on the hemiplegic arm |
|
| Measure | Description | Time Frame |
|---|---|---|
| EMG of biceps brachii | electromyographic frequency analysis of biceps brachii muscle activity at the hemiplegic side | through study completion, an average of 5 months |
| EMG of triceps brachii | electromyographic frequency analysis of triceps brachii muscle activity at the hemiplegic side | through study completion, an average of 5 months |
| EMG of pectoralis major | electromyographic frequency analysis of pectoralis major muscle activity at the hemiplegic side | through study completion, an average of 5 months |
| MyotonPRO measurement of pectoralis major muscle tone | MyotonPRO measurement of pectoralis major muscle tone | through study completion, an average of 5 months |
| heart rate | heart rate measurement assessed with the Zehpyr bioharness | through study completion, an average of 5 months |
| heart rate variability | heart rate variability assessed with the Zehpyr bioharness | through study completion, an average of 5 months |
| respiratory rate | respiratory rate assessed with the Zehpyr bioharness | through study completion, an average of 5 months |
| subjective rating of hypertonia |
| Measure | Description | Time Frame |
|---|---|---|
| MyotonPRO measurement of pectoralis major elasticity | MyotonPRO measurement of pectoralis major elasticity | through study completion, an average of 5 months |
| MyotonPRO measurement of pectoralis major stiffness |
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Inclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Ghent University | Ghent | Belgium |
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| intermittently inflated - triggered | Experimental | splint around the arm is intermittently inflated 5x flexion and extension with the contralateral arm (with weight of 5kg in the hands) |
|
| intermittent deep pressure applied by an air splint | Device | continuous inflation and deflation of the Johnstone air splint gives an intermittent local deep pression on the hemiplegic arm |
|
| uninflated air splint | Device | no deep pressure applied by the air splint |
|
| contralateral movement | Other | non-hemiplegic arm is flexed and extended 5 times, with a weight of 5kg in the hand, in order to trigger hypertonia in the hemiplegic arm |
|
visual analogue scale rating of the intensity of hypertonia, in which the degree of hypertonia has to be situated between "0" (no hypertonia) and "10" (very severe hypertonia) |
| through study completion, an average of 5 months |
MyotonPRO measurement of pectoralis major stiffness
| through study completion, an average of 5 months |
| ID | Term |
|---|---|
| D020521 | Stroke |
| D009122 | Muscle Hypertonia |
| ID | Term |
|---|---|
| D002561 | Cerebrovascular Disorders |
| D001927 | Brain Diseases |
| D002493 | Central Nervous System Diseases |
| D009422 | Nervous System Diseases |
| D014652 | Vascular Diseases |
| D002318 | Cardiovascular Diseases |
| D020879 | Neuromuscular Manifestations |
| D009461 | Neurologic Manifestations |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
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