[Changes in respiration after transection of the pons in decerebrate cats].
In decerebrate cats with intact nn. vagi, complete ablation of pneumotaxic center (PC) by transections of pons in vicinity of caudal border of medial parabrachial nucleus (NPBM) was not followed by a regular decrease of lungs ventilation (V), the latter consistently decreasing only after partial bilateral lesions of PC (either NPBM or Kölliker-Fuse nucleus). In partial PC lesions, changes of frequency of breathing as well as the inspiratory (TI) and expiratory (TE) durations were more obvious than after the complete PC ablation. Changes of breathing after pontine transections at NPBM caudal border were similar to those after vagotomy. The PC lesions are concluded to be able to disturb the respiration stronger than the complete PC ablations. After transections through caudal pontine levels, TI and TE prolongation was weaker than after more rostral transections due to lesions of apneustic mechanism.
D000818:Animals; D002415:Cats; D003655:Decerebrate State / Q000503:physiopathology*; D011149:Pons / Q000502:physiology*; D012119:Respiration; D012125:Respiratory Center / Q000502:physiology; D014628:Vagotomy
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