Exam 3: Control Of Respiration Flashcards
What is neurogenesis?
The growth and development of nervous tissue
neurogenesis of respiratory drive is largely where?
The brain medulla but influenced by other areas and some peripheral factors
neurons of the brain send impulses down the spinal cord to where?
Lower motor neurons which innervate the muscles
What consists of neuron “pools” mostly in the
upper medulla oblongata, with some additional neurons in the
pons?
Respiratory control center
What neuronal grouping receives information from chemoreceptors, baroreceptors and lung stretch receptors?
Dorsal respiratory group
Where do afferent/sensory signals from vagus and glossopharyngeal enter the respiratory control center?
Dorsal respiratory group
What is the main driver of respiratory control?
Dorsal respiratory group
Where is the dorsal respiratory group located?
Tractus solitarius
The dorsal respiratory group contains what kind of neurons?
Inspiratory neurons
Ventral Respiratory Group contains what kind of neurons?
Inspiratory and expiratory
Where is the pneumotaxic center located?
In the upper pons, within the nucleus parabrachialis
What neuronal grouping of the respiratory control center is wired into the inspiratory neurons of the ventral and dorsal respiratory groups?
Pneumotaxic center
Where is the chemosensitive area located?
At the ventral surface of the medulla
Neurons of what respiratory control center grouping are responsive to chemistry of CSF?
Chemosensitive are
What neuronal grouping of the respiratory control center is wired into the inspiratory neurons of the dorsal respiratory groups?
Chemosensitive area
the many inspiratory neurons of the
dorsal respiratory group display rhythm signals called what?
inspiratory ramp signal
The inspiratory neurons of the dorsal respiratory group primarily send signals where?
The diaphragm
NOTE: normal, restful breathing almost entirely an inspiratory/diaphragmatic
phenomenon (with expiration a passive recoil process)
An increase in inspiratory ramp signal would result in what?
Increased contraction of the diaphragm