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. 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 corpora quadrigemina, which is located on the posterior surface of the midbrain, is composed of two superior colliculi and two inferior colliculi. The superior colliculi are part of the visual system, relaying input from the optic tract to the lateral geniculate bodies of the thalamus.