RT Book, Section
A1 Freeman, Brian S.
A2 Freeman, Brian S.
A2 Berger, Jeffrey S.
SR Print(0)
ID 1102569495
T1 Baroreceptor Function
T2 Anesthesiology Core Review: Part One Basic Exam
YR 2014
FD 2014
PB McGraw-Hill Education
PP New York, NY
SN 9780071821377
LK accessanesthesiology.mhmedical.com/content.aspx?aid=1102569495
RD 2024/04/19
AB Baroreceptors  are  specialized  sensory  neurons  that  enable  the  central  nervous  system  (CNS)  to  maintain  short-term  control  of  blood  pressure.  These  mechanoreceptors  participate  in  a  reflex  (baroreceptor  reflex,  carotid  sinus  reflex)  that  regulates  the  mean  arterial  pressure,  relatively  constant  at  a  preset  value,  usually  around  100  mm  Hg.  In  this  negative  feedback  loop,  a  rise  in  blood  pressure  from  baseline  results  in  rapid  signals  from  the  baroreceptors  to  the  CNS  which  then  reduces  MAP  back  down  to  normal  level  through  the  autonomic  nervous  system.  A  slight  change  in  pressure  causes  a  strong  change  in  the  baroreflex  signal  to  readjust  arterial  pressure  back  toward  normal.  The  arterial  baroreceptor  reflex  serves  as  short-term  blood  pressure  buffering  system  in  response  to  relatively  abrupt  changes  in  blood  volume,  cardiac  output,  or  peripheral  resistance,  such  as  during  daily  activities  (posture  changes,  exercise)  and  during  surgery  (anesthesia,  hemorrhage).