Seaction 4 Regulation of respiratory movement 1 Formation of respiratory center and respiratory rhythm 1.1 respiratory center Superior part ofpons--Pneumotaxic center medulla oblongata--basical respiratory center spinal cord--primary respiratory center pones respiratory center 1.2 Formation of Respiratory Rhythm: Reversion inhibition themry(part neuronal circuit feedback and controling themry) (1)Central inspiratory activity:Ianeur is probably the source of central inspiratory activity. (2)inspiratory off-switch mechanism inspiration-initiative process,expiration-passive-process 2 Reflectivity Regulation of Reflective Movement 2.1 Pulmonary stretchreflex(Hering-Breuer reflex) Lobe oflung expands-inhibits inspiration Lobe of lung diminish strongly-inhibit respiration Significance (1)Urge inspiration change into expiration promptly,inhibit too deep or too long inspiration. (2)urge expiration change into inspiration promptly,inhibit tooSeaction 4 Regulation of respiratory movement 1 Formation of respiratory center and respiratory rhythm 1.1 respiratory center Superior part of pons --Pneumotaxic center medulla oblongata--basical respiratory center spinal cord--primary respiratory center pones respiratory center 1.2 Formation of Respiratory Rhythm: Reversion inhibition themry(part neuronal circuit feedback and controling themry) (1) Central inspiratory activity: Iαneur is probably the source of central inspiratory activity. (2) inspiratory off-switch mechanism inspiration-initiative process, expiration-passive -process 2 Reflectivity Regulation of Reflective Movement 2.1 Pulmonary stretch reflex (Hering-Breuer reflex) Lobe of lung expands—inhibits inspiration Lobe of lung diminish strongly—inhibit respiration Significance: （1）Urge inspiration change into expiration promptly,inhibit too deep or too long inspiration. （2）urge expiration change into inspiration promptly, inhibit too