<P> Progressive bulbar palsy (PBP) is a disease that attacks the nerves supplying the bulbar muscles . Infantile progressive bulbar palsy is progressive bulbar palsy in children . </P> <P> Both lampreys and hagfish possess a fully developed medulla oblongata . Since these are both very similar to early agnathans, it has been suggested that the medulla evolved in these early fish, approximately 505 million years ago . The status of the medulla as part of the primordial reptilian brain is confirmed by its disproportionate size in modern reptiles such as the crocodile, alligator, and monitor lizard . </P> <Ul> <Li> <P> Lobes </P> </Li> <Li> <P> Anteroinferior view of the medulla oblongata and pons . </P> </Li> <Li> <P> Base of brain . </P> </Li> <Li> <P> Diagram showing the positions of the three principal subarachnoid cisternæ . </P> </Li> <Li> <P> Medulla oblongata </P> </Li> <Li> <P> Micrograph of the posterior portion of the open part of the medulla oblongata, showing the fourth ventricle (top of image) and the nuclei of CN XII (medial) and CN X (lateral). H&E - LFB stain . </P> </Li> </Ul> <Li> <P> Lobes </P> </Li>

Over which of the following do the pons and superior medulla oblongata have somatic motor control