RT Book, Section
A1 Greenberg, David A.
A1 Aminoff, Michael J.
A1 Simon, Roger P.
SR Print(0)
ID 1182388520
T1 Coma
T2 Clinical Neurology, 11e
YR 2021
FD 2021
PB McGraw-Hill Education
PP New York, NY
SN 9781260458350
LK neurology.mhmedical.com/content.aspx?aid=1182388520
RD 2024/04/23
AB Coma  is  a  sleeplike  state  with  no  purposeful  response  to  the  environment  and  from  which  the  patient  cannot  be  aroused.  The  eyes  are  closed  and  do  not  open  spontaneously.  The  patient  does  not  speak,  and  there  is  no  purposeful  movement  of  the  face  or  limbs.  Verbal  stimulation  produces  no  response.  Painful  stimulation  may  produce  no  response  or  nonpurposeful  reflex  movements  mediated  through  spinal  cord  or  brainstem  pathways.  Coma  results  from  a  disturbance  in  the  function  of  the  brainstem  reticular  activating  system  above  the  mid  pons  or  of  both  cerebral  hemispheres  (Figure  3-1).