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Related Experiment Videos

Propriospinal myoclonus: a neurophysiologic analysis.

S Chokroverty1, A Walters, T Zimmerman

  • 1Department of Neurology and Clinical Neurophysiology, Robert Wood Johnson Medical School, New Brunswick, NJ.

Neurology
|August 1, 1992
PubMed
Summary
This summary is machine-generated.

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Two patients experienced spontaneous thoracoabdominal muscle jerks originating in the spinal cord. Neurophysiologic analysis revealed slow-conducting propriospinal pathways responsible for this spinal myoclonus.

Area of Science:

  • Neurophysiology
  • Neurology
  • Spinal Cord Research

Background:

  • Spontaneous thoracoabdominal muscle jerks are uncommon neurological events.
  • Understanding the origin and propagation of these jerks is crucial for diagnosis.

Observation:

  • Polymyographic recordings in two patients revealed myoclonic bursts originating in the rectus abdominis or intercostal muscles.
  • Jerks propagated both upwards to upper intercostal muscles and downwards to abdominal muscles via slow pathways.

Findings:

  • Jerk-locked back-averaging showed no cortical or premovement potentials, ruling out a cortical origin.
  • Normal peroneal somatosensory evoked responses, C-reflex, and intercostal nerve conduction indicated a localized spinal issue.

Implications:

Related Experiment Videos

  • The findings suggest a generator for the myoclonus located in the midthoracic spinal cord.
  • This condition may be classified as "propriospinal myoclonus," highlighting the role of propriospinal fibers.
  • This research aids in differentiating spinal myoclonus from other movement disorders.