1,3- DIPHENYLGUANIDINE ; 1,3-DIPHENYLGUANIDINE ; Accelerator D ; DENAX ; DFG ; Diphenyl guanidine ; Diphenylguanidine ; DPG ; EKALAND DPG ; GUANIDINE, 1,3-DIPHENYL -;MELANILINE ; GUANIDINE, 1,3-DIPHENYL- GUANIDINE, N,N'-DIPHENYL- KUMAC D ; MELANILINE ; MIXLAND+ DPG ; N,N'-DIPHENYLGUANIDIN ; N,N'-Diphenylguanidine ; Nocceler D ; Rubator DPG ; SYM-DIPHENYLGUANIDINE ; USAF B-19
The brain stem is the bottom-most portion of the brain, connecting the cerebrum with the spinal cord. The midbrain, pons, medulla oblongata, and reticular formation are all part of the brain stem. The midbrain is the short portion of the brain stem between the pons and the cerebral hemispheres. The top of the midbrain is called the tectum (or tectal area). The third and fourth cranial nerves originate in the midbrain.
The pons, which is also part of the brain stem, is inferior to the midbrain and superior to the medulla. Its posterior border is separated from the cerebellum by the aqueduct of Sylvius, and more inferiorly, by the fourth ventricle.Motor and sensory tracts traverse the anterior surface of the pons.he medulla is the most inferior part of the brain stem. The cell bodies of several cranial nerves are found there. Tthe cell body with it's nucleus, and the axon and axonal branches are all part of the lower motor neuron.