TY - CHAP M1 - Book, Section TI - Pupillary Control and Approach to Anisocoria Cranial Nerves 2 and 3 A1 - Berkowitz, Aaron L. Y1 - 2016 N1 - T2 - Clinical Neurology and Neuroanatomy: A Localization-Based Approach 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]). SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/10/14 UR - neurology.mhmedical.com/content.aspx?aid=1160203825 ER -