Section I29ControlofRespiration
Section IV 29 Control of Respiration
Respiratory CenterandFormation of the RespiratoryRhythm1 RespiratoryCeenter
Respiratory Center and Formation of the Respiratory Rhythm 1 Respiratory Center
Respiratory CentersPonsPneumotaxiccenterApneusticcenterRespiratoryDorsal respiratorycontrolMedullarygroupcenterinrespiratoryVentralrespiratorybrainstemcentergroupMedulla
Respiratory Centers
Two respiratory nuclei in medulla oblongata(dorsal respiratory group DRInspiratory centerfrequently they fire, moremoredeeplkl中yoiinhalelonger duration they fire, breath is prolongedslow rateExpiratory centerr (ventralrespiratory group, VRG)Pons·involvedinforcedPneumotaxiccenterexpirationApneusticcenterRespiratoryDorsalrespiratorycontrolMedullarygroupcenterinrespiratoryVentral respiratorybrainstemcentergroupMedulla
Two respiratory nuclei in medulla oblongata Expiratory center (ventral respiratory group, VRG) •involved in forced expiration Inspiratory center (dorsal respiratory group, DRG) • more frequently they fire, more deeply you inhale • longer duration they fire, breath is prolonged, slow rate
Respiratory Centers in PonsPneumotaxic centerr(upperpons)·Sends continual inhibitory impulses toinspyatohcenter of the medulla oblongata. As impulse frequency rises, breathe faster and shallower（长吸）Apneusticcenter(owerponsStimulationcausesapneusisPons?Integrates inspiratory cutoffinformationPneumotaxiccenterApneusticcenterRespiratoryDorsal respiratorycontrolMedullarygroupcenterinrespiratoryVentral respiratorybrainstemcentergroupMedulla
Respiratory Centers in Pons Apneustic （长吸） center (lower pons) • Sends continual inhibitory impulses to inspiratory center of the medulla oblongata, • As impulse frequency rises, breathe faster and shallower • Stimulation causes apneusis • Integrates inspiratory cutoff information Pneumotaxic center (upper pons)