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Related Experiment Video

Updated: Jan 19, 2026

Modeling Charcot-Marie-Tooth Disease In Vitro by Transfecting Mouse Primary Motoneurons
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The Mary Walker effect: Mary Broadfoot Walker.

Stuart J McCarter1, David B Burkholder2, James P Klaas2

  • 1Department of Neurology, Mayo Clinic, 200 First Street Southwest, Rochester, Minnesota 55905, USA, mccarter.stuart@mayo.edu.

The Journal of the Royal College of Physicians of Edinburgh
|September 10, 2019
PubMed
Summary
This summary is machine-generated.

Neuromuscular medicine pioneer Mary Broadfoot Walker first demonstrated the

Keywords:
Mary WalkerProstigminfamilial periodic paralysishistory of neurologymyasthenia gravis

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Area of Science:

  • Neuromuscular Medicine
  • Clinical Neurology

Background:

  • Mary Broadfoot Walker's research significantly advanced understanding of myasthenia gravis and familial periodic paralysis.
  • She identified the 'Mary Walker effect' related to muscle weakness after exercise-induced occlusion in myasthenia gravis patients.
  • Walker pioneered the use of physostigmine and neostigmine for temporary strength improvement in myasthenia gravis.

Discussion:

  • The 'Mary Walker effect' was erroneously attributed to her name, obscuring her foundational work on circulating agents for myasthenia gravis.
  • Her observation of hypokalemia in familial periodic paralysis led to the pioneering treatment with potassium chloride.

Key Insights:

  • Demonstrated temporary strength improvement in myasthenia gravis using specific medications.
  • Pioneered potassium chloride treatment for familial periodic paralysis.
  • Her work spurred the search for causative agents in myasthenia gravis.

Outlook:

  • Walker's contributions highlight the importance of clinical observation in driving therapeutic advancements.
  • Her legacy underscores the impact of non-academic physicians in neuromuscular medicine.