Functional characterization of at-level hypersensitivity in patients with spinal cord injury
At-level and above-level hypersensitivity was assessed in patients with chronic complete thoracic spinal cord injury (SCI). Patients were classified using somatosensory mapping (brush, cold, pinprick) and assigned into 2 groups (ie, patients with at-level hypersensitivity [SCIHs, n = 8] and without...
Gespeichert in:
| Hauptverfasser: | , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2017
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| In: |
The journal of pain
Year: 2016, Jahrgang: 18, Heft: 1, Pages: 66-78 |
| ISSN: | 1528-8447 |
| DOI: | 10.1016/j.jpain.2016.10.003 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1016/j.jpain.2016.10.003 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S1526590016302619 
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| Verfasserangaben: | Carola Vogel, Roman Rukwied, Lenka Stockinger, Marcus Schley, Martin Schmelz, Wolfgang Schleinzer, and Christoph Konrad |
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| 245 | 1 | 0 | |a Functional characterization of at-level hypersensitivity in patients with spinal cord injury |c Carola Vogel, Roman Rukwied, Lenka Stockinger, Marcus Schley, Martin Schmelz, Wolfgang Schleinzer, and Christoph Konrad |
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| 520 | |a At-level and above-level hypersensitivity was assessed in patients with chronic complete thoracic spinal cord injury (SCI). Patients were classified using somatosensory mapping (brush, cold, pinprick) and assigned into 2 groups (ie, patients with at-level hypersensitivity [SCIHs, n = 8] and without at-level hypersensitivity [SCINHs, n = 7]). Gender and age-matched healthy subjects served as controls. Quantitative sensory testing (QST), electrically- and histamine-induced pain and itch, laser Doppler imaging, and laser-evoked potentials (LEP) were recorded at-level and above-level in SCI-patients. Six of 8 SCIHs, but 0 of 7 SCINHs patients suffered from neuropathic below-level pain. Clinical sensory mapping revealed spreading of hypersensitivity to more cranial areas (above-level) in 3 SCIHs. Cold pain threshold measures confirmed clinical hypersensitivity at-level in SCIHs. At-level and above-level hypersensitivity to electrical stimulation did not differ significantly between SCIHs and SCINHs. Mechanical allodynia, cold, and pin-prick hypersensitivity did not relate to impaired sensory function (QST), axon reflex flare, or LEPs. Clinically assessed at-level hypersensitivity was linked to below-level neuropathic pain, suggesting neuronal hyperexcitability contributes to the development of neuropathic pain. However, electrically evoked pain was not significantly different between SCI patients. Thus, SCI-induced enhanced excitability of nociceptive processing does not necessarily lead to neuropathic pain. QST and LEP revealed no crucial role of deafferentation for hypersensitivity development after SCI. Perspective. At-level hypersensitivity after complete thoracic SCI is associated with neuropathic below-level pain if evoked by clinical sensory stimuli. QST, LEP, and electrically-induced axon reflex flare sizes did not indicate somatosensory deafferentation in SCIHs. | ||
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