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Related Concept Videos

Spinal Cord Injury ll: Pathophysiology01:14

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Spinal cord injury progresses through two interconnected phases: primary injury and secondary injury.Primary InjuryPrimary injury happens at the moment of trauma and involves immediate mechanical damage to the spinal cord.Compression happens when broken vertebrae, herniated discs, or accumulating blood (such as a hematoma) press directly against the spinal cord, distorting its normal shape and function. In cases of contusion, the cord is bruised by a blunt force (like penetrating injuries or...
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Alterations in muscle tone are common manifestations of neurological disorders and reflect dysfunction within different nervous system regions. Spasticity, paratonia, and dystonia represent distinct forms of hypertonia, each with unique mechanisms, clinical features, and diagnostic importance.CharacteristicsSpasticity happens from upper motor neuron lesions and is characterized by velocity-dependent resistance to passive movement. Clinical features include:Exaggerated deep tendon reflexesClonus...
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Evaluation of spasticity: IFCN Handbook Chapter.

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Summary

Spasticity lacks a clear definition, but objective biomechanical and electrophysiological measures can quantify its signs and symptoms. Understanding pathophysiology through these methods is key for effective spasticity management.

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Rehabilitation Medicine

Background:

  • Spasticity is clinically recognized but lacks a universal definition.
  • Commonly associated signs include hyperexcitable reflexes, spasms, and increased muscle resistance.
  • Aberrant muscle activation, such as antagonist co-contraction, is also characteristic.

Purpose of the Study:

  • To review quantitative and objective measurement techniques for spasticity signs and symptoms.
  • To explore neurophysiological methods for evaluating spinal motor control pathophysiology.
  • To emphasize the importance of objective measurements for optimal therapeutic strategies.

Main Methods:

  • Biomechanical techniques for assessing movement resistance and muscle activity.
  • Electrophysiological methods for quantifying reflex excitability and muscle activation patterns.
  • Neurophysiological assessments of spinal cord motor control mechanisms.

Main Results:

  • Biomechanical and electrophysiological techniques offer objective quantification of spasticity indicators.
  • Neurophysiological assessments can elucidate underlying pathophysiological changes in motor control.
  • Validated, reproducible measurements are crucial for differentiating spasticity components.

Conclusions:

  • Objective measurement techniques are vital for a precise understanding of spasticity.
  • Evaluating pathophysiology through quantitative methods aids in personalized treatment.
  • Standardized assessment is essential for advancing spasticity therapy and research.