TY - JOUR
T1 - A unique manifestation of pupillary fatigue in autoimmune autonomic ganglionopathy
AU - Muppidi, Srikanth
AU - Scribner, Maggie
AU - Gibbons, Christopher H.
AU - Adams-Huet, Beverley
AU - Spaeth, Elaine B.
AU - Vernino, Steven
PY - 2012/5
Y1 - 2012/5
N2 - Objective: To demonstrate a unique abnormality of the pupillary light reflex in patients with autoimmune autonomic ganglionopathy (AAG). Design: Case series. Setting: Autonomic clinics at 2 university hospitals (University of Texas Southwestern Medical Center and Beth Israel Deaconess Medical Center). Participants: Seven patients with antibody-positive AAG. Interventions: All patients with AAG underwent either monocular or binocular infrared pupillometry using a standard 2-second light stimulus at a defined intensity. Findings were compared with those from healthy control subjects and patients with other autonomic disorders. The light stimulus used in this study was selected to eliminate the normal phenomenon of pupil escape. Main Outcome Measures: The time to onset of redilation as well as other indices of pupillary constriction to light stimulus. Results: Patients with AAG exhibited premature pupillary redilation (mean [SD], 1.02[0.20] seconds) compared with healthy control subjects (mean [SD], 2.24 [0.10] seconds) and other patients with autonomic disorders (mean [SD], 2.30 [0.12] seconds) (P < .001). In healthy control subjects and patients with other autonomic disorders, pupillary redilation always followed the termination of the light stimulus; in patients with AAG, redilation consistently occurred during the light stimulus. In 1 patient, serial repetitive light stimulation further decreased the time to onset of redilation. Conclusions: Premature redilation of the pupil is a unique physiological feature seen only in patients with AAG. This phenomenon appears to be a manifestation of pupillary fatigue, a clinical correlate of defective synaptic transmission at the level of autonomic ganglia in antibodypositive AAG.
AB - Objective: To demonstrate a unique abnormality of the pupillary light reflex in patients with autoimmune autonomic ganglionopathy (AAG). Design: Case series. Setting: Autonomic clinics at 2 university hospitals (University of Texas Southwestern Medical Center and Beth Israel Deaconess Medical Center). Participants: Seven patients with antibody-positive AAG. Interventions: All patients with AAG underwent either monocular or binocular infrared pupillometry using a standard 2-second light stimulus at a defined intensity. Findings were compared with those from healthy control subjects and patients with other autonomic disorders. The light stimulus used in this study was selected to eliminate the normal phenomenon of pupil escape. Main Outcome Measures: The time to onset of redilation as well as other indices of pupillary constriction to light stimulus. Results: Patients with AAG exhibited premature pupillary redilation (mean [SD], 1.02[0.20] seconds) compared with healthy control subjects (mean [SD], 2.24 [0.10] seconds) and other patients with autonomic disorders (mean [SD], 2.30 [0.12] seconds) (P < .001). In healthy control subjects and patients with other autonomic disorders, pupillary redilation always followed the termination of the light stimulus; in patients with AAG, redilation consistently occurred during the light stimulus. In 1 patient, serial repetitive light stimulation further decreased the time to onset of redilation. Conclusions: Premature redilation of the pupil is a unique physiological feature seen only in patients with AAG. This phenomenon appears to be a manifestation of pupillary fatigue, a clinical correlate of defective synaptic transmission at the level of autonomic ganglia in antibodypositive AAG.
UR - http://www.scopus.com/inward/record.url?scp=84860901299&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84860901299&partnerID=8YFLogxK
U2 - 10.1001/archneurol.2011.2143
DO - 10.1001/archneurol.2011.2143
M3 - Article
C2 - 22232207
AN - SCOPUS:84860901299
SN - 0003-9942
VL - 69
SP - 644
EP - 648
JO - Archives of neurology
JF - Archives of neurology
IS - 5
ER -