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  • Title: Effects of sympathetic stimulation on mechanoreceptive and nociceptive afferent units from the rabbit pinna.
    Author: Barasi S, Lynn B.
    Journal: Brain Res; 1986 Jul 16; 378(1):21-7. PubMed ID: 3742202.
    Abstract:
    Single afferent units from the rabbit great auricular nerve were examined using cutaneous stimuli before, during and after tetanic stimulation of the cervical sympathetic trunk for 1-4 min. G-hair units showed a depression of responses during and for 1-2 min after sympathetic stimulation; D-hair units showed a similar pattern but the average depression was less. These changes are not likely to be due to a reduction in blood flow since no comparable effect was produced by arterial occlusion. Sensitive C-mechanoreceptor units were excited transiently by sympathetic stimulation and by arterial occlusion. Responses of nociceptors, both A-fibre high threshold mechanoreceptors and C-fibre polymodal nociceptors were unaffected by sympathetic stimulation.
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