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Updated: Sep 24, 2025
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Dynamic Quantitative Sensory Testing to Characterize Central Pain Processing
Published on: February 16, 2017
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Dissecting central post-stroke pain: a controlled symptom-psychophysical characterization
Luciana Mendonça Barbosa1, Valquíria Aparecida da Silva1, Antônia Lilian de Lima Rodrigues1
1Pain Center, Discipline of Neurosurgery HC-FMUSP, LIM-62, University of São Paulo, São Paulo, Brazil.
Brain Communications
|May 9, 2022
Summary
Central post-stroke pain, often difficult to treat, differs from non-neuropathic pain in location and sensory symptoms. Quantitative sensory testing and symptom inventories help distinguish neuropathic pain in stroke survivors.
Area of Science:
- Neurology
- Pain Medicine
- Neuroscience
Background:
- Central post-stroke pain (CPSP) affects up to 12% of stroke survivors and is challenging to treat.
- Stroke patients experience various pain types, including non-neuropathic pain (musculoskeletal, inflammatory, complex regional).
- A direct comparison of clinical and somatosensory profiles between CPSP and non-neuropathic post-stroke pain is lacking.
Purpose of the Study:
- To compare the clinical and somatosensory characteristics of central post-stroke pain (CPSP) with non-neuropathic post-stroke pain.
- To identify distinct features that differentiate CPSP from other chronic pain conditions in stroke survivors.
- To provide insights for more precise diagnosis and management of post-stroke pain.
Main Methods:
- Deep phenotyping of 39 patients with CPSP, 32 with non-neuropathic pain, and 31 pain-free stroke survivors.
- Comprehensive assessment including clinical examination, questionnaires (Neuropathic Pain Symptom Inventory), and quantitative sensory testing (QST).
- Analysis of pain location, symptom clusters, sensory thresholds (thermal, mechanical), and deafferentation levels.
Main Results:
- CPSP predominantly affected the face and limbs, while non-neuropathic pain was mainly axial (neck, shoulders, knees).
- Burning, tingling, and cold-evoked pain were more frequent in CPSP, along with hyperpathia and allodynia.
- CPSP patients showed increased deafferentation and asymmetric cold/warm detection thresholds, with cold hypoesthesia being a significant indicator (OR=12).
Conclusions:
- Central post-stroke pain exhibits distinct clinical and somatosensory features compared to non-neuropathic post-stroke pain.
- Quantitative sensory testing, particularly cold sensitivity, and specific symptom profiles aid in distinguishing CPSP.
- Combining QST, Neuropathic Pain Symptom Inventory, and bedside allodynia assessment accurately predicts CPSP, aiding clinical practice and research.
![Autoradiographic Measurements of [14C]-Iodoantipyrine in Rat Brain Following Central Post-Stroke Pain](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F53947.jpg&w=3840&q=50)
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