title: [Microsurgical anatomy importance of A1-anterior communicating artery complex].
abstract: BACKGROUND
  The anterior cerebral artery originates from the bifurcation of the internal carotid artery lateral to the optic chiasm, then joins with its contralateral counterpart via the anterior communicating artery. A1-anterior communicating artery complex is the most frequent anatomical variants and is the major site of aneurysms between 30 to 37%.
  
  
  OBJECTIVE
  Know the anatomy microsurgical, variants anatomical and importance of complex precommunicating segment-artery anterior communicating in surgery neurological of the pathology vascular, mainly aneurysms, in Mexican population.
  
  
  METHODS
  The study was performed in 30 brains injected. Microanatomy was studied (length and diameter) of A1-anterior communicating artery complex and its variants.
  
  
  RESULTS
  60 segments A1, the average length of left side was 11.35 mm and 11.84 mm was right. The average diameter of left was 1.67 mm and the right was 1.64 mm. The average number of perforators on the left side was 7.9 and the right side was 7.5. Anterior communicating artery was found in 29 brains of the optic chiasm, its course depended on the length of the A1 segment. The average length of the segment was 2.84 mm, the average diameter was 1.41 mm and the average number of perforators was 3.27. A1-anterior communicating artery complex variants were found in 18 (60%) and the presence of two blister-like aneurysms.
  
  
  CONCLUSIONS
  It is necessary to understand the A1-anterior communicating artery complex microanatomy of its variants to have a three-dimensional vision during aneurysm surgery.
authors: Laboratorio de Neuroanatomía, Coordinación de Ciencias Morfológicas. Escuela Superior de Medicina. Instituto Politécnico Nacional. México, DF, Mexico. ms_aleks@hotmail.com.
authors: Alejandro
authors: A
authors: Monroy-Sosa
authors: Laboratorio de Neuroanatomía, Coordinación de Ciencias Morfológicas. Escuela Superior de Medicina. Instituto Politécnico Nacional. México, DF, Mexico.
authors: Julio César
authors: JC
authors: Pérez-Cruz
authors: Laboratorio de Anatomía Microquirúrgica del Sistema Nervioso Central, Departamento de Anatomía, Facultad de Medicina, Universidad Nacional Autónoma de México, México, DF, Mexico.
authors: Gervith
authors: G
authors: Reyes-Soto
authors: Laboratorio de Neuroanatomía, Coordinación de Ciencias Morfológicas. Escuela Superior de Medicina. Instituto Politécnico Nacional. México, DF, Mexico.
authors: Carlos
authors: C
authors: Delgado-Hernández
authors: Laboratorio de Neuroanatomía, Coordinación de Ciencias Morfológicas. Escuela Superior de Medicina. Instituto Politécnico Nacional. México, DF, Mexico.
authors: Mario Alberto
authors: MA
authors: Macías-Duvignau
authors: Laboratorio de Anatomía Microquirúrgica del Sistema Nervioso Central, Departamento de Anatomía, Facultad de Medicina, Universidad Nacional Autónoma de México, México, DF, Mexico.
authors: Luis
authors: L
authors: Delgado-Reyes
mesh_terms: D000328:Adult; D020771:Anterior Cerebral Artery / Q000002:abnormalities / Q000033:anatomy & histology / Q000601:surgery; D002343:Carotid Artery, Internal / Q000033:anatomy & histology; D002536:Cerebral Arteries / Q000002:abnormalities / Q000033:anatomy & histology* / Q000601:surgery; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000453:epidemiology / Q000601:surgery*; D008297:Male; D008800:Mexico; D008866:Microsurgery; D008875:Middle Aged; D019635:Neurosurgical Procedures; D011446:Prospective Studies; D012016:Reference Values; D014656:Vascular Surgical Procedures; D055815:Young Adult
keywords: anatomical variants; aneurisma en ampolla; anterior cerebral artery; anterior communicating artery; arteria cerebral anterior; arteria comunicante anterior; blister-like aneurysm; variantes anatómicas