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SYMPATHETIC VASODILATOR OUTFLOW.
KAROLINSKA INSTITUTET STOCKHOLM (SWEDEN) DEPT OF PHARMACOLOGY
Sympathetic vasodilator nerves to the skeletal muscles in dogs were activated by 1 Electrical hypothalamic stimulation in anaesthetized dogs 2 electrical hypothalamus stimulation in unanaesthetized dogs by chronically implanted electrodes and 3 external stimuli firing shot to unanesthetized dogs. Activation of sympathetic vasodilator nerves seems to be associated with a behavior reaction pattern that could be interpreted as due to fear. The occurrence of sympathetic vasodilator fibers to the skeletal muscles of various species was investigated. Vasodilator fibers were found in the five different species of beasts studied, but not in 7 species of apes and lemurs investigated. The observation has a bearing on the undissolved question concerning the existence of sympathetic vasodilator fibers to the skeletal muscles in man. Author
Final technical rept.,