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Related Experiment Videos

Pupillary function in multiple sclerosis.

J Jakobsen1

  • 1Department of Neurology, Aarhus University Hospital, Denmark.

Acta Neurologica Scandinavica
|December 1, 1990
PubMed
Summary
This summary is machine-generated.

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Multiple Sclerosis (MS) patients with good vision show subtle autonomic pupillary disturbances. Prolonged pupillary light response (PLR) latency correlates with disease progression and walking impairment.

Area of Science:

  • Neuroscience
  • Ophthalmology
  • Autonomic Nervous System

Background:

  • Multiple Sclerosis (MS) is a demyelinating disease affecting the central nervous system.
  • Autonomic dysfunction is common in MS, impacting various physiological processes.
  • Pupillary light reflex (PLR) abnormalities can indicate neurological compromise.

Purpose of the Study:

  • To investigate pupillary reflex function in MS patients with preserved visual acuity.
  • To determine the relationship between pupillary reflex parameters and disease progression in MS.
  • To assess correlations between PLR latency and neurological function, such as walking performance.

Main Methods:

  • TV pupillography was used to assess light, dark, accommodation, and ciliospinal reflexes.

Related Experiment Videos

  • Participants included 18 MS patients (visual acuity ≥20/30) and 14 age/sex-matched controls.
  • Statistical analysis correlated PLR latency with walking performance and VEP latency.

    • Main Results:

    • No significant differences in pupillary response amplitude or constriction/dilation rates were found between MS patients and controls.
    • A significant prolongation of pupillary light response (PLR) latency was observed in MS patients.
    • PLR latency strongly correlated with walking performance (R=0.76, p<0.001) but not with VEP latency or optic neuritis history.

    Conclusions:

    • MS patients with preserved visual acuity exhibit discrete autonomic pupillary disturbances, primarily characterized by delayed PLR.
    • The prolonged PLR latency is linked to overall disease progression and functional impairment, specifically walking ability.
    • Pupillography may serve as a sensitive indicator of subclinical autonomic dysfunction in MS.