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Preserved somatosensory conduction in complete spinal cord injury: Discomplete SCI
Umea Univ, Sweden.
Linköping University, Department of Health, Medicine and Caring Sciences, Division of Prevention, Rehabilitation and Community Medicine. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Anaesthetics, Operations and Specialty Surgery Center, Department of Rehabilitation Medicine.ORCID iD: 0000-0001-7994-372X
Sunderby Hosp, Sweden.
Umea Univ, Sweden.
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2020 (English)In: Clinical Neurophysiology, ISSN 1388-2457, E-ISSN 1872-8952, Vol. 131, no 5, p. 1059-1067Article in journal (Refereed) Published
Abstract [en]

Objective: Spinal cord injury (SCI) disrupts the communication between brain and body parts innervated from below-injury spinal segments, but rarely results in complete anatomical transection of the spinal cord. The aim of this study was to investigate residual somatosensory conduction in clinically complete SCI, to corroborate the concept of sensory discomplete SCI. Methods: We used fMRI with a somatosensory protocol in which blinded and randomized tactile and nociceptive stimulation was applied on both legs (below-injury level) and one arm (above-injury level) in eleven participants with chronic complete SCI. The experimental design accounts for possible confounding mechanical (e.g. vibration) and cortico-cortical top-down mechanisms (e.g. attention/expectation). Results: Somatosensory stimulation on below-level insensate body regions activated the somatotopically corresponding part of the contralateral primary somatosensory cortex in six out of eleven participants. Conclusions: Our results represent afferent-driven cortical activation through preserved somatosensory connections to the brain in a subgroup of participants with clinically complete SCI, i.e. sensory discomplete SCI. Significance: Identifying patients with residual somatosensory connections might open the door for new rehabilitative and restorative strategies as well as inform research on SCI-related conditions such as neuropathic pain and spasticity. (C) 2020 International Federation of Clinical Neurophysiology. Published by Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER IRELAND LTD , 2020. Vol. 131, no 5, p. 1059-1067
Keywords [en]
Spinal cord injury; Functional MRI; Somatosensory; Discomplete; Non-conscious
National Category
Neurosciences
Identifiers
URN: urn:nbn:se:liu:diva-165322DOI: 10.1016/j.clinph.2020.01.017ISI: 000525862400011PubMedID: 32197128OAI: oai:DiVA.org:liu-165322DiVA, id: diva2:1427592
Note

Funding Agencies|foundation Promobilia; Umea University; Umea center for Functional Brain Imaging; Vasterbottens Lans Landsting

Available from: 2020-04-30 Created: 2020-04-30 Last updated: 2021-12-28

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Division of Prevention, Rehabilitation and Community MedicineFaculty of Medicine and Health SciencesDepartment of Rehabilitation Medicine
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