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Drosophila Adult Olfactory Shock Learning
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Revisit Spinal Shock: Pattern of Reflex Evolution during Spinal Shock.

Hyun-Yoon Ko1

  • 1Department of Rehabilitation Medicine, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Rehabilitation Hospital, Pusan National University Yangsan Hospital, Yangsan, Korea.

Korean Journal of Neurotrauma
|November 8, 2018
PubMed
Summary

Spinal shock, a state of depressed spinal cord function after injury, transitions to spasticity over weeks to months. Its precise definition, clinical signs, and underlying mechanisms remain debated topics in neuroscience.

Keywords:
AutomatismReflexSpinal cordSpinal cord injuries

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Area of Science:

  • Neuroscience
  • Neurology
  • Spinal Cord Injury Research

Background:

  • Sudden spinal cord severance causes immediate depression of functions below the injury level, termed spinal shock.
  • Spinal shock resolution is a gradual process, evolving over days to months, eventually leading to spasticity.
  • The precise definition, clinical indicators, and evolutionary pattern of spinal shock remain subjects of ongoing scientific debate.

Purpose of the Study:

  • To critically evaluate the current understanding and definitions of spinal shock.
  • To explore the controversies surrounding the clinical signs that indicate the termination of spinal shock.
  • To investigate the poorly defined underlying mechanisms of spinal shock and reflex recovery.

Main Methods:

  • Review and synthesis of existing literature on spinal shock.
  • Analysis of different proposed criteria for defining the end of spinal shock (e.g., bulbocavernosus reflex, deep tendon reflexes, detrusor activity).
  • Discussion of the sequence of reflex recovery (polysynaptic, monosynaptic, pathological, autonomic).

Main Results:

  • Spinal shock is characterized by the immediate depression of spinal cord functions and reflexes post-injury.
  • The transition from spinal shock to spasticity occurs over a variable period (days to months).
  • Disagreement exists regarding the definitive clinical signs marking the end of spinal shock and the order of reflex reappearance.

Conclusions:

  • The termination of spinal shock is not universally agreed upon, with various reflexes (somatic and autonomic) proposed as markers.
  • Further research is needed to clarify the mechanisms and temporal patterns of reflex recovery following spinal cord injury.
  • A consensus on defining the end of spinal shock is crucial for consistent clinical assessment and research.