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Related Experiment Video

Updated: Jul 19, 2025

A Battery of Motor Tests in a Neonatal Mouse Model of Cerebral Palsy
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Neonatal and infantile hypotonia.

David S Younger1

  • 1Department of Clinical Medicine and Neuroscience, CUNY School of Medicine, New York, NY, United States; Department of Medicine, Section of Internal Medicine and Neurology, White Plains Hospital, White Plains, NY, United States.

Handbook of Clinical Neurology
|August 10, 2023
PubMed
Summary

Neonatal and infantile hypotonia causes range from nervous system issues to genetic disorders. Advanced genetic sequencing now greatly improves diagnostic accuracy for these conditions.

Keywords:
Birth defectsClinical trialsCongenital muscular dystrophyCongenital myopathyContracturesGenetic therapyHypotoniaInfantileMetabolic disordersNeonatalNeuromuscular disordersPeripheral neuropathySpinal muscular atrophyTranslational research

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Area of Science:

  • Pediatrics
  • Genetics
  • Neurology

Background:

  • Neonatal and infantile hypotonia presents a diagnostic challenge with diverse etiologies.
  • Causes can stem from primary peripheral/central nervous system disorders or acquired/genetic conditions.

Approach:

  • Initial assessment involves bedside evaluation, birth history, developmental review, and family pedigree analysis.
  • Traditional methods included clinical signs, basic investigations, and electrophysiology for neuromuscular disorders.
  • Modern approaches integrate advanced genetic studies like whole-exome and next-generation sequencing.

Key Points:

  • Genetic sequencing has revolutionized the diagnosis of hypotonia.
  • Whole-exome sequencing and next-generation sequencing simplify identifying specific genetic defects.
  • Improved diagnostic accuracy is noted in many Mendelian disorders associated with hypotonia.

Conclusions:

  • The diagnostic paradigm for neonatal and infantile hypotonia has shifted significantly.
  • Genetic sequencing is now a cornerstone for accurate and efficient diagnosis.
  • This advancement aids in better understanding and managing hypotonia in infants and neonates.