Respiratory Control Flashcards
What neurons make up the DRG
Type I
What neurons make up the VRG
Type E and I
What neurons make up the PRG
Type I, E, and IE
What does the pre-botzinger complex do
Believed to be the site which generates the frequency of the respiratory rhythm
Define apneusis
Failure to turn inspiration off
When the PRG is lesioned, what happens
We lose the ability to turn inspiration off without additional sensory information from the vagus N.
What two parts determine the depth of the respiration
The DRG and VRG
What does the DRG do
95% premotor neurons to the phrenic N.
Receives sensory information to determine depth of breathing (Vt)
What does the VRG do
Rostral and caudal
Rostral - premotor to phrenic N. Controls depth of inspiration
Caudal - premotor to upper airway, controls depth of expiration
What will chemoreceptros do
Increase rate of activity when hypoxia or hypercapnia occur
What do the central chemoreceptors do and where are they located
Sense indirectly CO2 in blood by measuring H
Located on ventral surface of medulla
What do the peripheral chemoreceptors look for
O2, CO2 H
What is quicker, peripheral or central at detecting changes
Peripheral
The central chemoreceptors determine resp drive, while the peripheral receptors do what
Help change depth and rate of breathing
What does the PRG do
Determines frequency (timing) of resp
