Connected by the pons to the midbrain, this constituent of the brainstem merges with the spinal cord at the foramen magnum.  
This structure's unmyelinated fibers surround the fourth ventricle and it is odd in that its white matter lies on its outside, while its gray matter lies on its inside.  Difficulties with swallowing and gag reflex can indicate damage to the lateral portion of this process, from which seven of the cranial nerves emerge.  Connected by the pons to the midbrain, this constituent of the brainstem merges with the spinal cord at the foramen magnum.  FTP, identify this lowest part of the brain, a controller of autonomic nervous functions that lies anterior to and coordinates movement with the cerebellum.
This structure's unmyelinated fibers surround the fourth ventricle and it is odd in that its white matter lies on its outside, while its gray matter lies on its inside.  
medulla oblongata