Oculomotor abnormalities in patients with lesions involving the tectal region

F. Girotti, A. Cefalà, A. Sghirlanzoni, M. Savoiardo, G. Avanzini

Research output: Contribution to journalArticlepeer-review

Abstract

An analysis of ocular movements was performed in four patients with retraction nystagmus and paralysis of the upward gaze. The clinical and radiological data indicate that the lesion were relatively limited to the most rostral and dorsal portion of the mesencephalon. The electrooculographic examination disclosed not otherwise obvious abnormalities of horizontal ocular movements. The most prominent defect was a tendency to perform hypometric saccades followed by multiple corrective movements. This tendency was particularly evident in saccadic movements toward a light spot unexpectedly displaced in the visual field of the subject. It is suggested that lesions responsible for retraction nystagmus can also affect the visuomotor integration mechanisms: the foveation of the target is then obtained through a typical modification of the motor strategy.

Original languageEnglish
Pages (from-to)139-148
Number of pages10
JournalItalian Journal of Neurological Sciences
Volume1
Issue number2
DOIs
Publication statusPublished - Jun 1979

Keywords

  • Eye movement
  • Superior colliculus
  • Visuomotor integration

ASJC Scopus subject areas

  • Neuroscience(all)
  • Clinical Neurology

Fingerprint Dive into the research topics of 'Oculomotor abnormalities in patients with lesions involving the tectal region'. Together they form a unique fingerprint.

Cite this