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Related Experiment Video

Updated: Aug 29, 2025

Author Spotlight: Quantifying Pain Experience – An Illustrative Approach Using the Pain Body Diagram

Author Spotlight: Quantifying Pain Experience – An Illustrative Approach Using the Pain Body Diagram

Published on: July 7, 2023

Multidimensional pain phenotypes after Traumatic Brain Injury.

Linda E Robayo^1,2, Varan Govind³, Roberta Vastano^2,4

¹Neuroscience Graduate Program, University of Miami Miller School of Medicine, Miami, FL, United States.

Frontiers in Pain Research (Lausanne, Switzerland)

|September 5, 2022

Summary

Traumatic brain injury (TBI) can lead to chronic neuropathic pain, often linked with psychological distress and altered somatosensory function. Identifying distinct pain phenotypes post-TBI is crucial for understanding these complex relationships.

Keywords:

Traumatic Brain Injury chronic pain neuropathic pain pain phenotypes psychological distress quantitative somatosensory testing

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Last Updated: Aug 29, 2025

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Area of Science:

Neuroscience
Pain Research
Traumatic Brain Injury Studies

Background:

Over 50% of individuals experience chronic pain after traumatic brain injury (TBI).
Neuropathic pain is a significant component of post-TBI chronic pain.
The interplay between neuropathic pain, psychological distress, and somatosensory function after TBI requires further investigation.

Purpose of the Study:

To evaluate neuropathic pain symptoms, psychological and somatosensory function, and psychosocial factors in individuals with TBI.
To identify distinct phenotypes of neuropathic pain and anxiety following TBI.
To compare these phenotypes based on pain characteristics, functional outcomes, and psychosocial factors.

Main Methods:

Utilized a two-step cluster analysis on Neuropathic Pain Symptom Inventory and Beck's Anxiety Inventory scores.
Identified two phenotypes: Moderate Neuropathic Pain and Anxiety Scores (MNP-AS) and Low Neuropathic Pain and Anxiety Scores (LNP-AS).
Compared phenotypes on pain, psychological, somatosensory, and psychosocial variables.

Main Results:

Two neuropathic pain phenotypes were identified: MNP-AS (N=11) and LNP-AS (N=27).
The MNP-AS group showed higher scores for depression, PTSD, pain severity, and affective distress.
The MNP-AS group exhibited significantly lower thermal somatosensory function compared to the LNP-AS group.

Conclusions:

Neuropathic pain symptoms are common after TBI.
These symptoms are associated with increased psychosocial distress, including depression and PTSD.
Abnormal central pain processing pathways, indicated by altered somatosensory function, are linked to neuropathic pain post-TBI.