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Analgesia and Pain Management

Analgesia and Pain Management

Pain is critical to various clinical pathologies, provoking an urgent need for effective management. Pain, whether acute or chronic, is a complex neurochemical process. Its alleviation depends on the type, with nonopioid analgesics effective for mild to moderate pain, such as musculoskeletal or inflammatory pain, while neuropathic pain responds best to anticonvulsants, tricyclic antidepressants, or serotonin/norepinephrine reuptake inhibitors. For severe acute or chronic pain, opioids may be...

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Investigating Pain-Related Avoidance Behavior using a Robotic Arm-Reaching Paradigm

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Understanding Motor Adaptation in the Transition to Sustained Pain: Protocol for a Longitudinal Experimental Study.

Arnaud Duport^1,2, Phivos Phylactou^1,2, Gaspard Diotalevi^3,4

¹The Gray Centre for Mobility and Activity, Lawson Research Institute, London, ON, Canada.

JMIR Research Protocols

|June 18, 2026

Summary

This study investigates how chronic pain impacts motor behavior and brain activity over time. Findings will help develop personalized pain treatments by understanding the link between cortical changes and movement.

Keywords:

cognitive functions conditioned pain modulation electroencephalography induced pain motor adaptation transcranial magnetic stimulation

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Area of Science:

Neuroscience
Pain Research
Motor Control

Background:

Chronic pain affects over 30% globally, posing a significant public health challenge.
Current treatments for chronic pain are limited, necessitating mechanism-based, personalized approaches.
Motor behavior alterations are implicated in pain persistence, but underlying cortical dynamics are poorly understood.

Purpose of the Study:

To longitudinally investigate changes in cortical sensorimotor excitability.
To examine the relationship between these cortical changes and maladaptive motor behaviors in chronic pain.

Main Methods:

Prospective longitudinal study of 150 healthy adults experiencing experimentally induced muscle pain.
Assessment of motor variability (using EMG) and cortical mechanisms (EEG, TMS) across four visits.
Utilized growth curve modeling to analyze interindividual differences in motor behavior and cortical dynamics.

Main Results:

The study is ongoing, with recruitment initiated in April 2025 and data collection expected by 2028.
As of April 2026, 26 participants have been enrolled.
Full results are anticipated for publication by the end of 2028.

Conclusions:

Findings will enhance the understanding of motor behavior in chronic pain.
This research will establish a foundation for personalized pain therapies.
The study aims to move beyond generic treatments with limited efficacy.