Ocular motor behavior of children with neurofibromatosis 1

Adrian G. Lasker, Martha B. Denckla, David S. Zee

Research output: Contribution to journalArticle

Abstract

Patients with neurofibromatosis 1 show neurocognitive deficits including abnormal visuospatial performance, but oculomotor behavior has not been studied. We recorded saccades in neurofibromatosis 1 and normal children, ages 6 to 12 years. Patients showed increased latency and diminished amplitude to more eccentric targets for both visually guided and memory-guided saccades. Subtracting the latencies of visually guided saccades from memory-guided saccades produced no differences between groups. For predictive saccades (0.5 Hz), patients with neurofibromatosis 1 generated fewer anticipatory saccades than normal subjects, but patients with neurofibromatosis 1 made more direction errors in an antisaccade task. Patients with neurofibromatosis 1 show saccade abnormalities that are not easily ascribed to dysfunction within single cortical areas. Rather, the findings likely reflect (1) partial involvement of different components of a widely distributed cerebral network that controls saccades, (2) impaired visuomotor maturation in a brain abnormal early in development, and (3) excessive γ-aminobutyric acid-mediated inhibition, which could influence basal ganglia pathways that modulate superior colliculus activity.

Original languageEnglish (US)
Pages (from-to)348-355
Number of pages8
JournalJournal of child neurology
Volume18
Issue number5
DOIs
StatePublished - May 1 2003

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ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Clinical Neurology

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