Influence of ankle loading on standing postural control and lower limb muscle activation in persons with stroke
试验速览
- 阶段
- 2 期
- 状态
- 进行中（未招募）
- 入组人数
- 37
- 试验地点
- 1
- 主要终点
- 1.Postural sway using Posturography
研究概览
简要总结
Patients will be screenedand selected based on the inclusion/exclusion criteria. The selected patientswill be explained in brief about the study procedures and the tests and then aninformed consent will be obtained from them. After briefing them,individual’s demographic details will be recorded, followed by assessment ofthe outcome measures.
The outcome measures, that is, postural swayand lower limb muscle activation will be assessed using Static Posturography(Good Balance system, Metitur Ltd, Jyvaskyla, Finland) and WirelessElectromyography (DELSYS Trigno wireless EMG system, AD instruments, USA. 2016)respectively in the following 4 conditions:
Without weight aboveparetic ankle
-With 0.5 kg weight aboveparetic ankle
-With 1 kg weight aboveparetic ankle
-With 2 kgs weight aboveparetic ankle
The above test sequencewill be randomized using lottery method.
SurfaceEMG electrodes will be applied on the following muscles:
a) Tibialis anterior-over the area of greatest muscle bulk just lateral to the crest of the tibia onthe proximal half of the leg(11)
b) Soleus- on theposterior aspect of the leg, 5 centimeters below the insertion of gastrocnemii(12)
c) Lateral gastrocnemius-over the area of greatest bulk on the lateral calf(11)
d) Medial gastrocnemius-over the area of greatest bulk on the medial calf(11)
Afterapplying the electrodes, the weight cuff corresponding to the weight selectedby the patients will be applied over the paretic ankle and then the patientswill be asked to stand on force plate with their legs spread at shoulder widthand looking straight ahead for 30 seconds. Then postural sway velocity andvelocity moment of subjects in the standing posture will be measured, andsimultaneous in that 30 seconds RMS of the electromyographic signal in mV oftibialis anterior, soleus, lateral gastrocnemius and medial gastrocnemius willbe calculated using a wireless EMG. The outcome measures will be calculatedwith eyes open and eyes closed. Similarly, all the other test conditions willbe done, except for the test condition ‘without weight over paretic ankle’where without any weight cuff on the patient’s paretic ankle the outcomemeasures will be calculated. Rest period of 10 minutes will be provided betweeneach test condition.
研究设计
- 研究类型
- Interventional
入排标准
- 年龄范围
- 18.00 Year(s) 至 65.00 Year(s)（—）
- 性别
- All
入选标准
- •Patients with sub-acute or chronic stroke 2)Patients who can stand with or without supervision 3)MMSE- ≥ 24 4)Patients with unilateral stroke 5)People who have had single episode of stroke 6)Functional vision and hearing.
排除标准
- •Patients with any musculoskeletal disorders and injury of lower limb 2)Patients who had undergone recent lower extremity surgery 3)Patients with open wounds on ankle 4)Additional neurological or psychiatric disorders 5)Vestibular diseases 6)Uncooperative patients.
结局指标
主要结局
1.Postural sway using Posturography
时间窗: 4 time points: | Without weight on ankle for 30 seconds | With 0.5 kg weight on ankle for 30 seconds | With 1 kg weight on ankle for 30 seconds | With 2 kg weight on ankle for 30 seconds
- Sway velocities in the mediolateral and in the
时间窗: 4 time points: | Without weight on ankle for 30 seconds | With 0.5 kg weight on ankle for 30 seconds | With 1 kg weight on ankle for 30 seconds | With 2 kg weight on ankle for 30 seconds
anteroposterior directions will be calculated in mm/sec, and
时间窗: 4 time points: | Without weight on ankle for 30 seconds | With 0.5 kg weight on ankle for 30 seconds | With 1 kg weight on ankle for 30 seconds | With 2 kg weight on ankle for 30 seconds
- Velocity moment will be calculated in mm²/sec
时间窗: 4 time points: | Without weight on ankle for 30 seconds | With 0.5 kg weight on ankle for 30 seconds | With 1 kg weight on ankle for 30 seconds | With 2 kg weight on ankle for 30 seconds
次要结局
- 1.Weight symmetry using Posturography(2.Muscle activation using wireless EMG)