PHYSIOL 201 Chapter Notes - Chapter 14: Dorsal Respiratory Group, Ventral Respiratory Group, Medulla Oblongata

• School: U of M
• Department: Physiology
• Course: PHYSIOL 201
• Professor: Elizabeth Rust

Document Summary

Respiratory control center: normal, quiet breathing is not voluntary. We do not think inhale and then think exhale for each breath and consciously control our normal breathing. But (1) the muscles of respiration are skeletal muscles and so are controlled by motor neurons. It is near and a part of the ventral respiratory group (vrg). Behind the vrg is the dorsal respiratory group (drg). Pre-botzinger activation firing of drg neurons that synapse on motor neurons controlling inspiratory muscles. Increasing the number of ap bursts/min will increases the rate of breathing. Increasing the number of aps within a burst will increase depth of breathing: top 3 graphs show normal , nerve ap graph: each vertical line (spike) indicates an. So, there"s a burst of ap"s in the motor neurons to the inspiratory muscles (diaphragm primarily) diaphragm contracts inspiration of tv occurs . Ap"s cease muscle relaxes expiration of tv occurs. Then after a time, there is a second burst of.