Kinesiology 4432A/B Study Guide - Final Guide: Vagus Nerve, Sympathetic Nervous System, Beta Blocker

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 4432A/B
• Professor: Kevin Shoemaker

Document Summary

In an anesthetized dog set up where there are. Vagal part is still the most important (more potent) electrodes on the vagus nerve going into the sa node and another on the sympathetic nerve going to the sa node. Both of these electrodes are stimulated at the same time to see which one has the largest effect on hr. Not go back to normal (same stimulation of frequencies) System dominates in tersm of heart rate control when its turned on. The fact that the heart increased the same amount, the sympathetic side is not affecting the ability to increase hr it affects your baseline hr, but not the ability to increase hr. With atropine, the change in hr when you attempt the hr, it does not change. You haven"t (cid:271)lo(cid:272)ked the vagus nerve traffi(cid:272), all you have blocked the vagus nerve receptor communication system;