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Multiple Sclerosis l: Introduction

Multiple Sclerosis l: Introduction

Multiple sclerosis is a chronic autoimmune disease of the central nervous system (CNS) that affects the brain, spinal cord, and optic nerves. It is an inflammatory demyelinating disorder and a leading cause of neurological disability in young adults.EpidemiologyMS commonly begins between 20 and 40 years of age and is twice as common in women. Its exact cause remains unclear, but genetic susceptibility contributes, with higher risk in first-degree relatives and identical twins. A greater...

Neuroplasticity

Neuroplasticity

Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.

Long-term Potentiation

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.

Long-term Potentiation

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
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Plasticity

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Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...

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Related Experiment Video

Updated: Jun 15, 2026

Standardized Induction and Assessment of Long-term Potentiation-like Cortical Plasticity Using Transcranial Magnetic Stimulation

Standardized Induction and Assessment of Long-term Potentiation-like Cortical Plasticity Using Transcranial Magnetic Stimulation

Published on: November 7, 2025

Rapid-onset central motor plasticity in multiple sclerosis.

D Zeller¹, K aufm Kampe, A Biller

¹Department of Neurology, University of Leipzig, Liebigstr. 20, 04103 Leipzig, Germany.

|March 3, 2010

Summary

Central motor plasticity in multiple sclerosis (MS) is comparable to healthy individuals, despite motor deficits and central nervous system (CNS) injury. This suggests neuroplasticity does not limit recovery in MS patients.

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Last Updated: Jun 15, 2026

Standardized Induction and Assessment of Long-term Potentiation-like Cortical Plasticity Using Transcranial Magnetic Stimulation

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Experimental Demyelination and Remyelination of Murine Spinal Cord by Focal Injection of Lysolecithin

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Published on: March 26, 2015

Area of Science:

Neuroscience
Clinical Neurology
Rehabilitation Science

Background:

Multiple sclerosis (MS) is a chronic neurological disease characterized by central nervous system (CNS) injury and motor impairment.
Understanding the capacity for motor plasticity in MS is crucial for developing effective rehabilitation strategies.

Purpose of the Study:

To investigate rapid-onset central motor plasticity in patients with MS.
To examine the relationship between motor plasticity, motor impairment, and CNS injury in MS.

Main Methods:

A cross-sectional observational study involving 22 MS patients and matched healthy controls.
Motor plasticity assessed using paired associative stimulation (PAS) and a motor learning task.
Central nervous system (CNS) injury evaluated via magnetic resonance spectroscopy (NAA/Cr) and transcranial magnetic stimulation (TMS)-derived corticomuscular latency (CML).

Main Results:

MS patients exhibited greater motor impairment, prolonged CML, and decreased NAA/Cr compared to controls.
PAS-induced plasticity and motor learning were comparable between MS patients and controls.
No significant correlation was found between plasticity, motor learning, and measures of motor impairment or CNS injury.

Conclusions:

Rapid-onset motor plasticity is preserved in MS patients despite existing motor impairment and CNS injury.
The findings suggest that insufficient neuroplasticity is unlikely to be a primary constraint on functional recovery in MS.