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Behavioural Neurology
Volume 26, Issue 1-2, Pages 157-163
Clinical Note

The “Altitudinal Anton’s Syndrome”: Coexistence of Anosognosia, Blindsight and Left Inattention

A. Carota,1 F. Bianchini,2,3 L. Pizzamiglio,2,3 and P. Calabrese4

1Neurocenter GSMN, Genolier Clinic, Genolier, Switzerland
2Department of Psychology, University of Rome La Sapienza, Rome, Italy
3Neuropsychological Laboratory, IRCSS Santa Lucia Foundation, Rome, Italy
4Faculty of Cognitive Psychology, University of Basel, Switzerland

Received 26 March 2012; Accepted 26 March 2012

Copyright © 2013 Hindawi Publishing Corporation and the authors. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We describe a 69-year-old patient with superior altitudinal hemianopia who contentiously denied having any visual impairment after stroke in the lower banks of both calcarine fissures. Although the patient did not produce intentional responses to visual stimuli in the blind fields, he showed reduced reaction times to stimuli presented in the inferior visual fields when they were primed by identical stimuli in the superior blind fields. Furthermore he showed left extinction to the double stimulation and delayed reaction times for left unprimed stimuli in the inferior fields. Based on these findings we discuss the possibility that blindsight and right hemisphere damage might be both necessary conditions for denying bilateral blindness.