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The amplitude of the post‐ganglionic potential was measured in isolated preparations of the superior cervical ganglion from rats at different stages of thiamine deficiency. At low frequency stimulation (0·5/sec) a decrease in the post‐ganglionic potential amplitude was not observed until the final stages of thiamine deficiency. At high frequency stimulation (20/sec) the post‐ganglionic potential of the thiamine‐deficient rats showed an early and much more pronounced decrease in comparison with that observed in both normal animals and pair‐fed controls. The amplitude and conduction velocity of the different components of the sympathetic cord action potential were unaffected by thiamine deficiency.
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Perri et al. (1970) studied this question.
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