Pain, referred sensations, and involuntary muscle movements in brachial plexus injury

Acta Neurologica Scandinavica
Nanna B FinnerupT S Jensen

Abstract

Examination of the relationship between pain, sensory hypersensitivity, referred sensations and involuntary muscle jerks in patients with brachial plexus injury. Fourteen patients with brachial plexus lesions were included. Spontaneous background and paroxysmal pain and mechanically and thermally evoked pain were recorded. Areas with sensory hypersensitivity and referred pain were mapped on a body chart. This was supplemented by electrophysiological analysis in three patients. Sensory hypersensitivity and areas with pinprick-induced referred phantom sensations were present in adjacent dermatomes. There was no clear relationship between chronic neuropathic pain and referred sensations, but there was a correlation between pain paroxysms and sensory hypersensitivity in dermatomes adjacent to deafferented areas. In three patients, simultaneous referred sensations and short latency motor action potentials ipsilateral to the denervated side suggested origin at subcortical sites. The study suggests a possible role of a spinal generator for sensory hypersensitivity and referred sensations following denervation.

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Citations

Jul 10, 2013·The Clinical Journal of Pain·Benedict M WandG Lorimer Moseley
Jan 23, 2015·Hand Surgery : an International Journal Devoted to Hand and Upper Limb Surgery and Related Research : Journal of the Asia-Pacific Federation of Societies for Surgery of the Hand·Direk TantigatePanupan Songcharoen
Nov 23, 2011·Pain·Nanna Brix FinnerupTroels Staehelin Jensen
Apr 29, 2014·Pain·Apostol VasoMarshall Devor
Dec 21, 2011·The International Journal of Lower Extremity Wounds·Jens FoellJonathan Cole
Jun 26, 2020·Physiological Reviews·Nanna Brix FinnerupTroels Staehelin Jensen

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