Tactile unit properties after human cervical spinal cord injury

Brain : a Journal of Neurology
Christine K Thomas, G Westling

Abstract

Properties of tactile afferent units innervating the glabrous skin of the hand were examined by microneurography in 11 individuals who had no or impaired touch perception due to chronic (> 1 year post-injury) cervical spinal cord injury (SCI). The results were compared with published control data. The adaptation properties [fast adaptation unit (FA) or slow adaptation unit (SA)], the indentation force threshold, and the size of the receptive field of each unit were assessed using calibrated von Frey hairs. Units were classified as type I (FAI, SAI) or type II (FAII, SAII) if the receptive field was small and well defined or large and diffuse, respectively. Sensitivity to skin stretch was also used to distinguish between the two slowly adapting unit types. In SCI subjects, 66 tactile afferents (and 16 unclassified muscle receptors) were sampled from all the glabrous skin areas typically innervated by the median nerve. Each unit type was represented in similar proportions in the SCI and control data. Similarly, there was an increase in the innervation density from the palm to the finger tips in SCI subjects, as found in control subjects. Afferent axon conduction velocities were not different for the SCI and control data. Indentat...Continue Reading

Citations

Dec 26, 2001·Muscle & Nerve·Christine K ThomasBrenda Bigland-Ritchie
Sep 24, 2005·Experimental Brain Research·Maria KnikouWilliam Zev Rymer
Oct 8, 2013·European Journal of Applied Physiology·Javier Rodriguez-Falces, Nicolas Place
Jun 27, 2012·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Roger A MoorePhilip J Corr
Jul 19, 2011·Medical Engineering & Physics·Andreas Inmann, Morten Haugland
Jun 29, 2004·The Journal of Comparative Neurology·Tracy S TranPatricia E Phelps
Jan 20, 2006·Muscle & Nerve·Jane E ButlerChristine K Thomas
Apr 17, 2016·Progress in Neurobiology·Goran ŠimićPatrick R Hof
Feb 2, 2019·The Journal of Comparative Neurology·Matthew CrowleyCorinna Darian-Smith
Apr 14, 2006·Journal of Neurophysiology·C K Häger-RossC K Thomas
Mar 4, 2003·Journal of Neurophysiology·Inge Zijdewind, Christine K Thomas
Jul 19, 2000·Journal of Neurophysiology·C K ThomasR P Bunge
Apr 27, 2002·Journal of Neurophysiology·Lisa GriffinChristine K Thomas
Aug 16, 2005·Journal of Applied Physiology·Douglas M WallaceChristine K Thomas
Feb 18, 2003·Journal of Applied Physiology·Edith Ribot-CiscarChristine K Thomas

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