Microstructural plasticity in nociceptive pathways after spinal cord injury

نویسندگان

چکیده

Objective To track the interplay between (micro-) structural changes along trajectories of nociceptive pathways and its relation to presence intensity neuropathic pain (NP) after spinal cord injury (SCI). Methods A quantitative neuroimaging approach employing a multiparametric mapping protocol was used, providing indirect measures myelination (via contrasts such as magnetisation transfer (MT) saturation, longitudinal relaxation (R1)) iron content effective transverse rate (R2*)) used microstructural within pathways. In order characterise concurrent entire neuroaxis, combined brain template embedded in statistical parametric framework used. Multivariate source-based morphometry performed identify naturally grouped patterns variation individuals with without NP SCI. Results NP, lower R1 MT values are evident primary motor cortex dorsolateral prefrontal cortex, while increases R2* cervical cord, periaqueductal grey (PAG), thalamus anterior cingulate when compared pain-free individuals. Lower PAG greater associated intensity. Conclusions The degree across ascending descending is critically implicated maintenance NP. Tracking maladaptive plasticity unravels intimate relationships neurodegenerative compensatory processes states may facilitate patient monitoring during therapeutic trials related neuroregeneration.

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ژورنال

عنوان ژورنال: Journal of Neurology, Neurosurgery, and Psychiatry

سال: 2021

ISSN: ['0022-3050', '1468-330X']

DOI: https://doi.org/10.1136/jnnp-2020-325580