title: The ultrastructure of the middle cerebral artery and its associated nerve fibers in the squirrel monkey and baboon.
abstract: This study describes the ultrastructural characteristics of the middle cerebral artery and its related neural elements in the squirrel monkey and baboon. The cytoarchitecture of the M-1 segment as well as that of the smaller extracerebral and intracerebral vessels is comparable in both animals. Smooth muscle elements are occasionally found within the intimal lining. The nerve bundles associated with vessels contain fewer myelinated fibers as the vessel diameter decreases. The cytological relationship between the neural structures and the smooth muscle cells are discussed.
mesh_terms: D000818:Animals; D002536:Cerebral Arteries / Q000294:innervation / Q000648:ultrastructure*; D004547:Elastic Tissue / Q000648:ultrastructure; D004727:Endothelium / Q000648:ultrastructure; D000882:Haplorhini / Q000033:anatomy & histology*; D008854:Microscopy, Electron; D009130:Muscle, Smooth / Q000648:ultrastructure; D009413:Nerve Fibers, Myelinated / Q000648:ultrastructure; D009474:Neurons / Q000648:ultrastructure; D009940:Organoids / Q000648:ultrastructure; D010215:Papio / Q000033:anatomy & histology*; D012583:Schwann Cells / Q000648:ultrastructure