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The neuronal theory of experimental traumatic spinal cord dysfunction
Surgical Neurology
|May 1, 1975
Summary
Traumatic spinal cord injury causes neuronal membrane dysfunction, leading to non-excitable nerve cells and permanent paralysis. This study proposes a new theory for spinal cord injury pathophysiology.
Area of Science:
- Neuroscience
- Pathophysiology
- Biomolecular mechanisms
Background:
- Experimental traumatic spinal cord injury in Rhesus monkeys causes hyperemia, not ischemia, in the lateral funiculus.
- This hyperemia is sufficient to cause permanent paraplegia.
Purpose of the Study:
- To propose a new theory of primary neuronal dysfunction to explain spinal cord injury pathophysiology.
- To elucidate the molecular mechanisms underlying neuronal dysfunction post-injury.
Main Methods:
- Reappraisal of existing data from the author and other investigators.
- Formulation of a theoretical model based on observed hyperemia and neuronal behavior.
Main Results:
- Absence of ischemia in the lateral funiculus suggests a non-ischemic cause for paralysis.
- A theory of primary neuronal dysfunction is proposed.
Conclusions:
- Initial injury induces a biomolecular rearrangement in neuronal membranes.
- This rearrangement impairs sodium conductance, rendering neurons non-excitable and causing permanent paraplegia.