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Related Experiment Video

Updated: Feb 3, 2026

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Oculomotor Function in Individuals With Rett Syndrome.

Gillian S Townend1, Raymond van de Berg2, Laurèl H M de Breet3

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|October 21, 2018
PubMed
Summary

Individuals with Rett syndrome (RTT) show intact oculomotor function, essential for eye gaze communication. However, challenges in testing require modified assessment procedures for accurate results.

Keywords:
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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Ophthalmology

Background:

  • Rett syndrome (RTT) significantly impacts communication, with individuals relying heavily on eye gaze.
  • The oculomotor system's role in eye gaze communication is crucial but under-researched in RTT.
  • Understanding neural and motor pathways for eye gaze is vital for RTT development.

Purpose of the Study:

  • To investigate oculomotor function in individuals with Rett syndrome.
  • To address the knowledge gap in RTT's specific developmental and functional areas.
  • To enhance understanding of RTT through oculomotor assessments.

Main Methods:

  • Electronystagmography (ENG) assessed horizontal saccadic and smooth pursuit eye movements.
  • Optokinetic nystagmus and vestibulo-ocular reflex were evaluated in 18 girls/women with RTT.
  • Results were compared to normative data from 16 typically developing individuals.

Main Results:

  • Individuals with RTT demonstrated a range of eye movements comparable to typically developing peers.
  • Challenges in ENG testing, including motivation, attention, and signal quality, complicated quantitative analysis.
  • Variability in eye movement execution was observed within the RTT cohort.

Conclusions:

  • The oculomotor system appears intact in individuals with Rett syndrome.
  • Modifications to ENG assessment procedures are recommended to overcome testing difficulties.
  • Further research is needed to refine testing methods and strengthen findings for RTT oculomotor function.