Topographic Disorientation and Amnesia due to Cerebral Hemorrhage in the Left Retrosplenial Region

ferior parietal lobe and the limbic system are impaired, leading to heading disorientation – a disorder in which patients are unable to remember the direction in which to go, although they are still able to recognize familiar buildings and homes [3] . In this study, we report a case of a patient Dear Sir, Since the report by Valenstein et al. [1] , it has been known that a lesion in the dominant retrosplenial region produces amnesia. On the other hand, a lesion in the same location in the nondominant hemisphere produces topographical disorientation [2] . Specifically, connections between the inReceived: November 15, 2006 Accepted: March 17, 2007 Published online: October 11, 2008