RT Book, Section
A1 Berkowitz, Aaron L.
SR Print(0)
ID 1174547554
T1 Pupillary Control and Approach to Anisocoria
Cranial Nerves 2 and 3
T2 Clinical Neurology and Neuroanatomy: A Localization-Based Approach
YR 2016
FD 2016
PB McGraw-Hill Education
PP New York, NY
SN 9781259834400
LK neurology.mhmedical.com/content.aspx?aid=1174547554
RD 2024/04/20
AB Pupillary  constriction  is  a  parasympathetic  function  and  pupillary  dilation  is  a  sympathetic  function  (“wide  eyed  with  fear”).  The  pupils  constrict  in  response  to  light  and  accommodation,  and  dilate  in  response  to  darkness  and  adrenergic  states.  Pupillary  asymmetry  is  referred  to  as  anisocoria,  and  can  be  caused  by  a  variety  of  neurologic  and  ophthalmologic  conditions.  Changes  in  pupil  size  can  also  be  caused  by  medications.  Miosis  refers  to  an  abnormally  constricted  pupil,  and  mydriasis  refers  to  an  abnormally  dilated  pupil  (mnemonic:  mydriasis  is  a  longer  word  than  miosis,  and  mydriasis  refers  to  the  larger  pupil  size  [i.e.,  dilated]).