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Abstract #3326

Multidimensional analysis of longitudinal mechanical stimulus-induced fMRI in Mice of both sexes

Hui-Fen Chen1, Bruno Pradier1,2, Hammad Bhatti1, Hsin-Yi Chao1, Nina Nagelmann1, Martin Sandbrink1, Mirjam Augustin2, Daniel Segelcke2, Esther Pogatzki-Zahn2, and Cornelius Faber1
1Clinic of Radiology, University of Münster, Münster, Germany, 2Department of Anesthesiology Intensive Care, Pain Medicine of the University Hospital Münster, Münster, Germany

Synopsis

Keywords: Task/Intervention Based fMRI, fMRI (task based), functional connectivity, acute post-surgical pain, sex difference, mechanosensation, dimensionality reduction, principal component analysis

Motivation: Acute postsurgical pain remains difficult to treat and may result in complications including chronic pain and increased use of opioids if insufficiently controlled.

Goal(s): A better understanding of the mechanisms inducing and maintaining these pain states is critical in both sexes.

Approach: Longitudinal task fMRI was performed with two different mechanical stimulations in male and female mice following acute incision pain (INC) compared to sham-treated animals.

Results: Our mixed-method analysis approach identifies INC-regulated brain regions and highlights divergent mechanical pain processing in mice of both sexes.

Impact: Our mixed-method analysis approach integrating the general linear model analysis combined with principal component analysis and analysis of functional connectivity provides deep insights into CNS plasticity during incision-induced pain and provides detailed information on relevant brain regions and interaction patterns.

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Keywords