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Updated: Jul 18, 2025

ALS - Motor Neuron Disease: Mechanism and Development of New Therapies

ALS - Motor Neuron Disease: Mechanism and Development of New Therapies

Published on: July 29, 2007

Primary lateral sclerosis.

Sina Marzoughi¹, Gerald Pfeffer², Neil Cashman¹

¹Division of Neurology, Department of Medicine, University of British Columbia, Vancouver, BC, Canada.

Handbook of Clinical Neurology

|August 24, 2023

Summary

This summary is machine-generated.

Primary lateral sclerosis (PLS) is a rare neurodegenerative disease affecting upper motor neurons with unknown causes. Current treatments are symptomatic, highlighting the need for further research into its genetics and pathophysiology.

Keywords:

Lower motor neuron Motor neuron diseases Primary lateral sclerosis Spasticity Upper motor neuron

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Area of Science:

Neurology
Neuroscience

Background:

Primary lateral sclerosis (PLS) is a rare, sporadic neurodegenerative disease affecting upper motor neurons.
It is characterized by a progressive loss of motor neurons, leading to gradual functional decline.

Approach:

This chapter provides a comprehensive overview of PLS.
It covers clinical and electrodiagnostic features, differential diagnosis, and current understanding of genetics and pathophysiology.

Key Points:

The etiology of PLS remains largely unknown despite advances in neuroimaging and molecular biology.
There are currently no disease-modifying treatments available for PLS.
Research is hampered by the disease's rarity and limited understanding of its underlying mechanisms.

Conclusions:

The current management of PLS is primarily symptomatic.
Future research directions are crucial for understanding PLS and developing effective therapies.