Brain Advance Access published online on January 4, 2008
Brain, doi:10.1093/brain/awm317
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Distinct visual perspective-taking strategies involve the left and right medial temporal lobe structures differently
1LPPA, Collège de France-CNRS, 11 Place Marcelin Berthelot, 75005 Paris, 2UPRES EA 4042 Contrôle Moteur et Perception, Univ Paris-Sud, Orsay, 3JE 2497, University of Lille 3, Lille, 4LENA CNRS UPR 640 Laboratoire de Neurosciences Cognitives et d’Imagerie Cérébrale, Paris and 5INSERM 739 ‘Cortex et Epilepsie’, Salpêtrière Hospital, Paris, France
Correspondence to:
Simon Lambrey, LPPA, Collège de France-CNRS, 11 Place Marcelin Berthelot, 75005 Paris, France E-mail: simon.lambrey{at}college-de-france.fr
This study assesses the role of the human medial temporal lobe (MTL) structures in the coordination of spatial information across perspective change and, in particular, in visual perspective taking—namely the capacity to know what another individual is seeing on the visual scene. Fourteen patients with unilateral temporal lobe resection and 21 control subjects performed two tasks, called ‘object location memory’ and ‘viewpoint recognition’, respectively. In the object location memory task, subjects had to memorize the position of a target object in the environment from an initial viewpoint. They were then shown the same environment from a new viewpoint and had to indicate whether or not the target object had moved. In the viewpoint recognition task, subjects had to imagine the perspective of an avatar from the initial viewpoint and then decide whether or not the new viewpoint was that of the avatar. The results showed a double dissociation, with left MTL patients being impaired in the object location memory task but not in the viewpoint recognition task and right MTL patients being impaired in the viewpoint recognition task but not in the object location memory task. Furthermore, based on multiple regression analyses between performance and the volumes of the different MTL structures, we discuss the specific involvement of the left temporopolar cortex and of the right hippocampus in different kinds of visual perspective taking.
Key Words: perspective taking; spatial memory; social cognition; temporopolar cortex; hippocampus
Abbreviations: LTL, left temporal lobe; MTL, medial temporal lobe; RTL, right temporal lobe; WAIS-R, Wechsler Adult Intelligence Scale-Revised
Received May 22, 2007. Revised November 26, 2007. Accepted December 11, 2007.