Source:http://linkedlifedata.com/resource/umls/id/C0035284
MSH: A region extending from the PONS & MEDULLA OBLONGATA through the MESENCEPHALON, characterized by a diversity of neurons of various sizes and shapes, arranged in different aggregations and enmeshed in a complicated fiber network.,CSP: area in the tegmentum of the midbrain and pons and its continuation into the medulla and upper spinal cord, characterized by a diversity of neurons of various sizes and shapes, arranged in different aggregations and enmeshed in a complicated fiber network.