FURTHER STUDIES ON THE EFFECTS OF THE TRANSECTION OF THE BRAIN STEM UPON THE RESPIRATORY MOVEMENTS

Abstract

On the dogs and cats decerebrated under urethane and morphine anesthesia the transection of the brain stem was performed to ascertain whether the socalled pneumotaxic center plays any role in originating a normal respiratory rhyhtm or not.
(1) The rostral half or two thirds of the pons could be removed without producing any remarkable change of the breathings, i.e., without producing the apneusis or apneustic breathings.
(2) From the results described above it may be unnecessary to assume the socalled pneumotaxic center to exist in the upper pons.