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Mapping the neuroethological signatures of pain, analgesia, and recovery in mice.

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Bohic, Manon 
Pattison, Luke A 
Jhumka, Z Anissa 
Rossi, Heather 
Thackray, Joshua K 

Abstract

Ongoing pain is driven by the activation and modulation of pain-sensing neurons, affecting physiology, motor function, and motivation to engage in certain behaviors. The complexity of the pain state has evaded a comprehensive definition, especially in non-verbal animals. Here, in mice, we used site-specific electrophysiology to define key time points corresponding to peripheral sensitivity in acute paw inflammation and chronic knee pain models. Using supervised and unsupervised machine learning tools, we uncovered sensory-evoked coping postures unique to each model. Through 3D pose analytics, we identified movement sequences that robustly represent different pain states and found that commonly used analgesics do not return an animal's behavior to a pre-injury state. Instead, these analgesics induce a novel set of spontaneous behaviors that are maintained even after resolution of evoked pain behaviors. Together, these findings reveal previously unidentified neuroethological signatures of pain and analgesia at heightened pain states and during recovery.

Description

Keywords

analgesia, behavior, computer vision, electrophysiology, machine learning, motion sequencing, mouse, nociception, pain, recovery, Mice, Animals, Pain, Analgesia, Analgesics, Pain Management, Neurons, Nociception

Journal Title

Neuron

Conference Name

Journal ISSN

0896-6273
1097-4199

Volume Title

Publisher

Elsevier BV
Sponsorship
Biotechnology and Biological Sciences Research Council (BB/M011194/1)
BBSRC (BB/V509528/1)
MRC (MR/W002426/1)
Arthritis Research UK (11600/21973)
BBSRC (1943916)