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Related Experiment Videos

Visuocortical bilirubin-induced neurological dysfunction.

William V Good1, Chuan Hou1

  • 1Smith-Kettlewell Eye Research Institute, 2318 Fillmore St, San Francisco, CA 94115, USA.

Seminars in Fetal & Neonatal Medicine
|January 12, 2015
PubMed
Summary
This summary is machine-generated.

Elevated total serum bilirubin (TB) levels in infants, even without kernicterus, may cause measurable changes in visual function. The steady-state VEP test detects these neurological effects in visuocortical functioning.

Keywords:
Bilirubin-induced neurologic dysfunction (BIND)HarmonicsJaundiceSweep visual-evoked potentialVisual-evoked potentials

Related Experiment Videos

Area of Science:

  • Neonatal neurology
  • Neuro-ophthalmology
  • Bilirubin metabolism

Background:

  • Jaundice is common in newborns, with elevated total serum bilirubin (TB) levels.
  • High bilirubin levels can cause neurological damage (kernicterus).
  • Subtle neurological effects from moderate TB levels are less understood.

Purpose of the Study:

  • To investigate if elevated TB levels, below the threshold for kernicterus, impact visuocortical functioning.
  • To review the utility of the steady-state visual-evoked potential (VEP) in detecting these changes.
  • To assess neurological effects in infants with moderately elevated TB.

Main Methods:

  • Utilized the steady-state visual-evoked potential (VEP) as a non-invasive neurophysiological tool.
  • Compared visual function metrics (thresholds, amplitudes) in infants with jaundice and elevated TB to control infants.
  • Analyzed data from infants with TB levels between 10 and 25 mg/dL without kernicterus.

Main Results:

  • Preliminary data indicate measurable changes in visual function in infants with jaundice and moderately elevated TB levels.
  • These changes were detected using the steady-state VEP.
  • The VEP provided insights into vision thresholds, signal amplitudes, and suprathreshold changes.

Conclusions:

  • The steady-state VEP is a promising tool for assessing visual function in infants exposed to bilirubin.
  • Neurological changes in visuocortical functioning may occur at TB levels previously considered safe.
  • Further research is warranted to understand the long-term implications of these findings.