A quick look at slow saccades after cardiac surgery: where is the lesion?

  • Solomon D
  • Ramat S
  • Leigh R
 et al. 
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Abstract

Saccadic palsy is a reported complication of cardiac surgery. One case that came to autopsy showed midline pontine gliosis; however, in most cases, no lesions are evident on neuroimaging. Since the saccadic palsy may range from single large slow saccades to a "staircase" of very small saccades that are normal in speed, it seems plausible that more than one mechanism is possible. Here we postulate that, in those patients who make a staircase of small saccades, loss of cerebellar Purkinje cells could cause fastigial nucleus neurons to fire prematurely, thereby decelerating saccades via inhibitory burst neurons. © 2008 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Purkinje cells
  • excitatory burst neuron
  • fastigial nucleus
  • inhibitory burst neuron
  • omnipause neurons
  • saccades
  • saccadic hypometria
  • saccadic palsy

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