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Updated: Sep 12, 2026

The Neuromuscular Junction: Measuring Synapse Size, Fragmentation and Changes in Synaptic Protein Density Using Confocal Fluorescence Microscopy
12:18

The Neuromuscular Junction: Measuring Synapse Size, Fragmentation and Changes in Synaptic Protein Density Using Confocal Fluorescence Microscopy

Published on: December 26, 2014

The floppy infant: recent advances in the understanding of disorders affecting the neuromuscular junction

C T Gay1, J B Bodensteiner

  • 1University of Texas Southwestern Medical Center, Dallas.

Neurologic Clinics
|August 1, 1990
PubMed

Insights

Evaluating a floppy infant involves understanding numerous hypotonia causes affecting the brain, spinal cord, or motor unit. This article reviews these conditions, including congenital myasthenic syndromes and infant botulism.

Area of Science:

  • Pediatrics
  • Neurology

Background:

  • Floppy infant, characterized by hypotonia, presents a diagnostic challenge.
  • Hypotonia can stem from central nervous system, spinal cord, or peripheral motor unit disorders.

Purpose of the Study:

  • To provide a comprehensive overview of conditions causing hypotonia in infants.
  • To discuss specific neuromuscular transmission disorders, including congenital myasthenic syndromes and infant botulism.

Main Methods:

  • Literature review of pediatric hypotonia.
  • Discussion of recently described congenital myasthenic syndromes.
  • Overview of infant botulism.

Main Results:

  • Identified numerous conditions causing infantile hypotonia.
  • Detailed discussion of four distinct congenital myasthenic syndromes.
  • Highlighted infant botulism as a key neuromuscular disorder.

Conclusions:

  • Clinicians must consider a broad differential diagnosis for floppy infants.
  • Neuromuscular junction disorders are critical considerations in infantile hypotonia.
  • Recent advances in understanding congenital myasthenic syndromes are important.

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