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  • Title: Types of afferents from the knee joint evoking sympathetic reflexes in cat inferior cardiac nerves.
    Author: Sato Y, Schaible HG, Schmidt RF.
    Journal: Neurosci Lett; 1983 Aug 19; 39(1):71-5. PubMed ID: 6633939.
    Abstract:
    In anesthetized cats electrical stimulation of the medial articular nerve of the knee joint evoked sympathetic reflex discharges in inferior cardiac nerves. Low intensity single stimuli elicited early reflex discharges (A-reflexes, latency 70-90 ms, duration 110-200 ms) whereas short tetanic stimulation at higher intensities evoked, in addition, late reflexes (C-reflexes, latency 390-480 ms, duration 230-400 ms). An analysis of the relation between the conduction velocity and the electrical threshold of 231 single medial articular nerve fibers revealed that the A-reflex is mainly due to activation of Group II units, whereas the C-reflex is evoked by activity in unmyelinated Group IV fibers.
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