Related Experiment Videos
Saccade deficits after a unilateral lesion affecting the superior colliculus
C Pierrot-Deseilligny1, A Rosa, K Masmoudi
1Service de Neurologie, Hôpital de la Salpêtrière, Paris, France.
Journal of Neurology, Neurosurgery, and Psychiatry
|December 1, 1991
Summary
A patient
Area of Science:
- Neuroscience
- Ophthalmology
- Neurology
Background:
- The superior colliculus is a key brain region involved in controlling eye movements.
- Understanding its role in saccadic eye movements is crucial for diagnosing and treating visual-motor disorders.
Observation:
- A 70-year-old patient with a right superior and inferior colliculi hematoma was studied.
- Eye movements, specifically visually-guided saccades, were recorded using electro-oculography at two time points post-hematoma onset.
Findings:
- Latency of lateral reflexive visually-guided saccades was asymmetrical.
- Leftward saccade latency and accuracy were impaired in the overlap task.
- Error rates in immobility and anti-saccade tasks decreased over time, suggesting improved inhibitory control.
Implications:
- The superior colliculus is critical for both initiating and inhibiting reflexive visually-guided saccades.
- These findings contribute to understanding the neural basis of saccade control and the impact of collicular lesions.