title: Magnetic resonance correlate of hemiparesis in posterior cerebral artery infarction.
abstract: BACKGROUND
  Magnetic resonance (MR) imaging of posterior cerebral artery infarction with hemiparesis (PCAH) is limited to case reports with T2-weighted lesions involving the cerebral peduncle.
  
  
  OBJECTIVE
  We sought to extend the MR imaging correlate of PCAH.
  
  
  METHODS
  The case histories and MR/MR angiography findings of 4 patients with PCAH were examined.
  
  
  RESULTS
  Distinct from previously described MR imaging findings with PCAH, diffusion-weighted imaging and/or FLAIR changes were noted in the thalamogeniculate artery (TGA) territory in one patient; in the distribution of the TGA and lateral posterior choroidal artery (PChA) in two patients; and in the TGA and lateral PChA combined with the peduncular perforating arteries of the cerebral peduncle in one patient.
  
  
  CONCLUSIONS
  Diffusion-weighted imaging changes of infarction in the distribution of the TGA alone or combined with lateral PChA involvement with or without cerebral peduncle infarction correlate with PCAH.
authors.affiliation: Department of Neurology, Hartford Hospital and University of Connecticut School of Medicine, Hartford, CT 06102-5037, USA. pfinell@harthosp.org
authors.forename: Pasquale F
authors.initials: PF
authors.lastname: Finelli
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002941:Circle of Willis / Q000033:anatomy & histology / Q000473:pathology / Q000503:physiopathology; D004525:Efferent Pathways / Q000098:blood supply / Q000473:pathology / Q000503:physiopathology; D005260:Female; D006801:Humans; D020762:Infarction, Posterior Cerebral Artery / Q000150:complications / Q000473:pathology* / Q000503:physiopathology; D018810:Magnetic Resonance Angiography; D008297:Male; D010291:Paresis / Q000209:etiology / Q000473:pathology* / Q000503:physiopathology; D020769:Posterior Cerebral Artery / Q000033:anatomy & histology / Q000473:pathology* / Q000503:physiopathology; D011237:Predictive Value of Tests; D011712:Pyramidal Tracts / Q000098:blood supply / Q000473:pathology / Q000503:physiopathology; D013681:Tegmentum Mesencephali / Q000098:blood supply* / Q000473:pathology* / Q000503:physiopathology