Related Experiment Video
Updated: Jun 28, 2025
07:17
An Improved Assay and Tools for Measuring Mechanical Nociception in Drosophila Larvae
Published on: October 29, 2020
4.7K
Top-down attention does not modulate mechanical hypersensitivity consecutive to central sensitization: insights from
Delia Della Porta1,2, Eléonore Scheirman1, Valéry Legrain1,2,3
1Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium.
Pain
|April 10, 2024
Summary
Engaging in a demanding working memory task did not prevent secondary hypersensitivity, a sign of central sensitization. This suggests that attention alone may not be enough to modulate pain sensitization effectively.
Area of Science:
- Neuroscience
- Pain Research
- Cognitive Psychology
Background:
- The neurocognitive model of attention to pain posits that diverting cognitive resources away from pain can reduce pain perception.
- Previous studies show attention diversion reduces acute pain, suggesting a potential top-down modulatory mechanism for persistent pain.
- However, empirical evidence for attention's effect on pain sensitization, specifically secondary hypersensitivity, is lacking.
Purpose of the Study:
- To investigate if a demanding working memory task (high cognitive load) can prevent the development of secondary hypersensitivity compared to an easy task (low cognitive load).
- To test the hypothesis that top-down attention modulation can inhibit central sensitization.
Main Methods:
- A preregistered, double-blind, between-subject study with 85 healthy volunteers.
- Participants were randomly assigned to perform either a difficult or easy visual working memory task.
- Secondary hypersensitivity was induced via high-frequency stimulation on the forearm, with mechanical sensitivity measured at baseline and 40 minutes post-induction.
Main Results:
- No significant difference in the development of secondary hypersensitivity was observed between the difficult and easy task groups.
- Neither the intensity nor the spatial extent of mechanical sensitivity differed between the two conditions.
- The results indicate that the cognitive load of the working memory task did not influence pain sensitization.
Conclusions:
- Top-down modulation of pain through attention may not be sufficient to inhibit or affect the development of secondary hypersensitivity.
- Engaging cognitive resources via a demanding task does not appear to prevent central sensitization in this experimental paradigm.
- Further research is needed to explore other or combined mechanisms for modulating pain sensitization.
Related Concept Videos
01:30Hypersensitivities
622
Hypersensitivity, also known as a hypersensitivity reaction or allergic reaction, is a condition where the body's immune system reacts abnormally to a foreign substance. Such substances, that cause hypersensitivity are referred to as an allergen, could be something typically harmless to most people, like pollen or certain foods.
Types of Hypersensitivities
Hypersensitivity reactions are categorized into four types: Type 1, Type 2, Type 3, and Type 4. Each type has a distinct mechanism...
Types of Hypersensitivities
Hypersensitivity reactions are categorized into four types: Type 1, Type 2, Type 3, and Type 4. Each type has a distinct mechanism...
622
01:33Somatosensation
36.6K
The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
36.6K
01:25Analgesia and Pain Management
614
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...
614