Related Experiment Video
Updated: May 20, 2026

Testing of all Six Semicircular Canals with Video Head Impulse Test Systems
Published on: April 18, 2019
Up-down asymmetry of saccadic contrapulsion in lateral medullary syndrome
Diego Kaski1, Paul Bentley, Russell Lane
1Imperial College London, Charing Cross Hospital, London, United Kingdom.
Abstract:
We report greater amplitude of horizontal contrapulsion on upward vs. downward vertical saccades in a patient with saccadic contrapulsion as a result of a focal demyelinating lesion of the left dorsolateral medulla. The vertical asymmetry in horizontal saccadic contrapulsion likely relates to an imbalance of fastigial oculomotor inputs on horizontal burst neurons during vertical saccades as reported in nonhuman primates. Our finding suggests that such asymmetry is also present in humans and provides insight into the pathophysiology of saccade generation.
More Related Videos
05:44Using Saccadometry with Deep Brain Stimulation to Study Normal and Pathological Brain Function
Published on: July 14, 2016
06:46Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
Published on: March 18, 2019
Related Concept Videos
Major Somatic Sensory Pathways
Lateralization