RT Book, Section
A1 Waxman, Stephen G.
SR Print(0)
ID 1137638254
T1 Vascular Supply of the Brain
T2 Clinical Neuroanatomy, 28e
YR 2017
FD 2017
PB McGraw-Hill Education
PP New York, NY
SN 9780071847704
LK accessphysiotherapy.mhmedical.com/content.aspx?aid=1137638254
RD 2024/04/19
AB The  brain  and  spinal  cord  are  critically  dependent  on  an  uninterrupted  supply  of  oxygenated  blood,  and  thus  are  dependent  on  unimpeded  flow  through  the  cerebral  vessels.  About  18%  of  the  total  blood  volume  in  the  body  circulates  in  the  brain,  which  accounts  for  about  2%  of  the  body  weight.  The  blood  transports  oxygen,  nutrients,  and  other  substances  necessary  for  proper  functioning  of  the  brain  and  carries  away  metabolites.  Loss  of  consciousness  occurs  in  less  than  15  seconds  after  blood  flow  to  the  brain  has  stopped,  and  irreparable  damage  to  the  brain  tissue  occurs  within  5  minutes.