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Neuromuscular Junction And Blockade

Neuromuscular Junction And Blockade

The site of chemical communication between a motor neuron and a muscle fiber is called the neuromuscular junction (NMJ). The end of the motor neuron at the NMJ divides into a cluster of synaptic end bulbs. The cytoplasm of these bulbs consists of synaptic vesicles enclosing acetylcholine molecules, the principal neurotransmitter released at the NMJ. The region opposite the synaptic bulb that ends in the muscle fiber is called the motor end plate, which has acetylcholine receptors. Within the...

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In Vivo Electrophysiological Measurement of Compound Muscle Action Potential from the Forelimbs in Mouse Models of Motor Neuron Degeneration

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Multifocal Motor Neuropathy with Persistent Conduction Block: The Seminal Case.

François Ochsner¹, Laurent Tatu²

¹Department of Neurology, CHUV Lausanne, Lausanne, Switzerland.

European Neurology

|November 11, 2020

Summary

Multifocal motor neuropathy (MMN), a rare neurological condition causing asymmetric weakness, was identified through early patient cases. This article details the history and first publication recognizing MMN.

Keywords:

Conduction block History of neurology Peripheral neuropathy

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Area of Science:

Neurology
Medical History

Background:

Multifocal motor neuropathy (MMN) is a rare neurological disorder.
Historically, its distinct characteristics were not fully understood.

Observation:

The article examines the earliest documented patient with MMN.
This patient presented with asymmetric muscle weakness and cramping, alongside spontaneous motor unit activity but no sensory deficits.

Findings:

Electrophysiology revealed persistent conduction blocks, typically affecting the proximal upper extremities.
The first scientific publication on MMN by Roth et al. in 1986 was pivotal in its medical recognition.

Implications:

Understanding the historical context of MMN aids in recognizing this rare condition.
The initial case and subsequent publication were crucial for establishing MMN as a distinct neurological entity.