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Related Concept Videos

Spinal Cord Injury ll: Pathophysiology01:14

Spinal Cord Injury ll: Pathophysiology

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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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Secondary Spinal Cord Injury llI: Pathophysiology01:25

Secondary Spinal Cord Injury llI: Pathophysiology

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Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...
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Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

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An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...
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The Spinal Cord01:54

The Spinal Cord

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The spinal cord is the body’s major nerve tract of the central nervous system, communicating afferent sensory information from the periphery to the brain and efferent motor information from the brain to the body. The human spinal cord extends from the hole at the base of the skull, or foramen magnum, to the level of the first or second lumbar vertebra.
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Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

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Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
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Herniated Intervertebral Disc l: Introduction01:29

Herniated Intervertebral Disc l: Introduction

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Intervertebral disc herniation refers to the displacement of the nucleus pulposus (the gel-like inner core of the disc) through a tear or weakened area in the annulus fibrosus (the outer fibrous ring). The displaced disc material extends beyond the normal boundaries of the disc space and may compress or irritate nearby spinal nerve roots or, less commonly, the spinal cord.Etiology and Risk FactorsHerniation commonly results from degeneration, in which aging reduces disc hydration and...
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Related Experiment Video

Updated: May 3, 2026

Photothrombosis-induced Focal Ischemia as a Model of Spinal Cord Injury in Mice
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Spinal cord ischemia/injury.

T Ishikawa, H Suzuki, K Ishikawa

  • 1Division of Neurosciences, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi, 755-8505, Japan. medlibn@yamaguchi-u.ac.jp.

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Summary

This review explores how spinal cord injury impacts neural pathways and discusses anesthetics and analgesics as potential neuroprotective treatments. Advances in stem cell therapy offer hope for improved neurological outcomes.

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Area of Science:

  • Neuroscience
  • Neurosurgery
  • Pharmacology

Background:

  • Spinal cord injury (SCI) causes sensory and motor deficits by damaging white and gray matter.
  • Damage to dorsal horn interneurons and motoneurons limits therapeutic strategies for SCI.
  • Neuroprotective interventions are crucial for improving neurological outcomes after SCI.

Purpose of the Study:

  • To review the pathophysiological mechanisms of SCI.
  • To examine anesthetics and analgesics with neuroprotective potential during the perioperative period.
  • To discuss recent advances in neuroprotection and regenerative therapies for SCI.

Main Methods:

  • Literature review of SCI pathophysiology.
  • Analysis of studies on anesthetic and analgesic neuroprotection.
  • Examination of stem cell biology and neural repair research.

Main Results:

  • Isoflurane shows potential as an inhalational neuroprotectant.
  • Barbiturates demonstrate evidence of neuroprotective effects.
  • Stem cell biology and regenerative interventions offer optimism for SCI treatment.

Conclusions:

  • Understanding SCI pathophysiology is key to developing effective treatments.
  • Anesthetics and analgesics represent promising avenues for perioperative neuroprotection.
  • Advances in regenerative medicine provide a hopeful outlook for SCI recovery.