Abstract
Summary
The origin of the vasoconstrictor fibers to the nasal mucosa of the dog was investigated by nasal plethysmography and anterior root stimulation. T2 stimulation, more often gave the greatest vasoconstrictor effect, T1 and T3 gave good vasoconstriction, T4 and T5 progressively less, T6 doubtful, and T7 and T8 no constriction. In exceptional instances C8 might give some constriction.
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