Optimizing the restoration and rehabilitation of function using cortically-controlled FES following SCI
Optimizing the restoration and rehabilitation of function using cortically-controlled FES following SCI
批准号:
10397418
负责人:
Matthew Tresch
金额:
$51.44万
依托单位国家:
美国
项目类别:
财政年份:
2019
资助国家:
美国
项目状态:
已结题
起止时间:
2019-07-01 至 2024-04-30
关键词:
AnimalsBiologicalBrainControl GroupsElectrodesGoalsHindlimbHybridsImplantImplanted ElectrodesIndividualIntramuscularLearningLimb structureMotorMotor CortexMotor NeuronsMovementMuscleNeuronsPathway interactionsPerformancePersonsProductionRattusRehabilitation therapyResearchSiteSpinalSpinal CordSpinal cord injurySynapsesSystemTrainingWorkbrain machine interfacedesignexperimental studyflexibilityfunctional electrical stimulationfunctional improvementfunctional outcomesfunctional restorationimprovedimproved functioninglimb movementmotor function improvementnovelpreservationrelating to nervous systemrestorationspinal pathwaystem cellstreadmill trainingwireless
中文摘要
尽管干细胞移植和其他生物医学方法的长期前景看好,但目前的生物医学选择仍需进一步改进。
脊髓损伤(SCI)后的功能仍然相当有限。然而,脑-机接口(BMI)不能满足这一要求。
使用皮质神经活动仪来驱动肌肉或脊髓的功能性电刺激功能(FES),效果很好。
承诺不仅包括在使用BMI时改善运动能力,而且还包括改善其功能。
康复是为了让他们的整体表现在BMI指数被移除的情况下得到改善。这是我们研究的总体目标。
正在努力确定新的战略,以最大限度地利用这些潜在的优势和优势,实现皮质控制的FES。
一个利用大脑皮层神经活动来驱动对个体肌肉的刺激的系统,可能不会最大限度地促进神经修复。
运动功能:通过使用户能够改变个人肌肉的运动幅度和运动时间,可以实现更多的运动。
可能会根据需要进行调整,以更好地实现任务和需求。此外,还可以采用替代战略,以实现更高的生产效率。
例如,在产生肢体屈曲或伸展的过程中,脊髓周围的肌肉群或部位的激活将会发生。
减少可能的运动范围。尽管这些运动策略可能比运动后的运动更容易学习。
对个人肌肉的控制,如果它们明确限制了无法恢复的运动和肌肉功能的最高水平。
然而,为了实现最大的功能康复,脊椎神经刺激可能不是一个更好的选择。
有希望的治疗策略比肌肉刺激更重要。反复的脊髓刺激可能无法维持脊柱的正常功能。
参与移动设备的最新生产过程的路径,以及能够使设备连接从下降中恢复的路径。
系统通过联想的可塑性进行调节。相反,由于肌肉的刺激并不能完全激活脊髓神经通路。
为了更好地进行运动,它可能不会产生更少的功能性运动康复。
因此,在肌肉刺激和脊柱刺激之间存在一个潜在的权衡:肌肉刺激和脊髓刺激能够实现。
高水平的运动能力,但可能会限制功能康复,而脊柱刺激可能不会增强。
康复可能会限制灵活性。但我们的研究团队将不会调查这种权衡,而不是设计一种新型混合动力车的最终目标。
该系统将脊柱运动和肌肉运动刺激相结合,以实现运动能力和功能的高水平测试。
康复。
我们还将在大鼠身上进行这些新的实验,通过在大脑皮层植入新的电极来记录大脑的神经活动。
然后,我们将训练大鼠,让它们使用这些运动系统。
SCI,正在评估他们是否能够进一步提高运动能力和功能康复。在目标1中,我们将继续评估。
动物是否能产生高水平的运动能力,取决于一个控制系统,使用大脑皮质神经活动来控制大脑的激活。
在Aim 2中,我们将继续评估动物是否正在使用皮质神经活动来控制神经元的激活速度。
脊髓神经刺激术在功能康复方面取得了更好的效果。最后,在第三个目标中,我们将不会评估是否会有一个新的混合式医疗系统。
这可以控制肌肉肌肉和脊髓神经刺激的激活速度,并利用每种方法的优势。
产生运动,从而导致运动能力和功能康复水平的提高。
英文摘要
Despite the long-term promise of stem-cell and other biological approaches, current options to improve
function following spinal cord injury (SCI) remain quite limited. However, brain machine interfaces (BMIs) that
use cortical activity to drive functional electrical stimulation (FES) of muscles or the spinal cord have great
promise not only for the restoration of motor ability when using the BMI, but also for improved functional
rehabilitation so that their performance is improved when the BMI is removed. The overall goal of our research
is to identify strategies that maximize both of these potential strengths of cortically-controlled FES.
A system using cortical activity to drive stimulation of individual muscles might maximize the restoration
of motor function: by enabling users to vary the amplitude and timing of individual muscles, movements can
potentially be adapted as necessary to achieve task demands. Alternate strategies of producing movement,
such as activation of muscle groups or of sites in the spinal cord producing limb flexion or extension, will
reduce the range of possible movements. Although these strategies might be simpler to learn after SCI than
control of individual muscles, they clearly limit the level of motor function that can be restored.
In order to achieve the greatest functional rehabilitation, however, spinal stimulation might be a more
promising strategy than muscle stimulation. Repeated spinal stimulation might maintain the function of spinal
pathways involved in the production of movement and enable restoration of connections from descending
systems through associative plasticity. Conversely, since muscle stimulation does not activate spinal pathways
to produce movement, it might produce less functional rehabilitation.
There is therefore a potential tradeoff between muscle and spinal stimulation: muscle stimulation enables
high levels of motor ability but might limit functional rehabilitation, while spinal stimulation might enhance
rehabilitation but limit flexibility. Our research will investigate this tradeoff, with the goal of designing a hybrid
system that combines spinal and muscle stimulation to achieve high levels of both motor ability and functional
rehabilitation.
We will perform these experiments in rats, implanting electrodes in the cortex to record neural activity
and in the spinal cord and muscles to produce movements. We will then train rats to use these systems after
SCI, evaluating whether they can improve motor ability and functional rehabilitation. In Aim 1, we will evaluate
whether animals can produce high levels of motor ability with a system using cortical activity to control activation
of individual muscles. In Aim 2, we will evaluate whether animals using cortical activity to control activation of
spinal stimulation have better functional rehabilitation. Finally, in Aim 3 we will evaluate whether a hybrid system
that controls activation of both muscle and spinal stimulation, exploits the advantages of each approach to
produce movement, resulting in high levels of both motor ability and of functional rehabilitation.
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Optimizing the restoration and rehabilitation of function using cortically-controlled FES following SCI
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批准号:10613441
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项目类别:
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资助金额:$51.98万
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财政年份:2019
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负责人:Matthew Tresch
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依托单位:
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In situ measurement of sarcomere operating range in passive and active muscle
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批准号:8502250
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Restoration of movement using muscle synergies to control natural limb dynamics
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Physiological and biomechanical analysis of muscle synergies in rat locomotion
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Physiological and biomechanical analysis of muscle synergies in rat locomotion
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依托单位:
海外基金