• Muscle & nerve · Jul 2006

    Comparative Study

    Unmyelinated tactile afferents underpin detection of low-force monofilaments.

    • Jonathan Cole, M Catherine Bushnell, Francis McGlone, Mikael Elam, Yves Lamarre, Ake Vallbo, and Håkan Olausson.
    • Department of Clinical Neurophysiology, Poole Hospital and University of Bournemouth, Bournemouth, United Kingdom.
    • Muscle Nerve. 2006 Jul 1; 34 (1): 105-7.

    AbstractHuman hairy but not glabrous skin has unmyelinated (C) tactile (CT) afferents that project to insular cortex. We studied two subjects with the rare sensory neuronopathy syndrome who lack A-beta fibers but have relatively preserved C-fiber function. Weak monofilaments were detected on hairy skin alone. Hence, the ability to detect light touch does not depend entirely on the A-beta somatosensory system; CT afferents may contribute to the detection of weak monofilaments.

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