Tags

Type your tag names separated by a space and hit enter

Mental space travel: damage to posterior parietal cortex prevents egocentric navigation and reexperiencing of remote spatial memories.
J Exp Psychol Learn Mem Cogn. 2010 May; 36(3):619-34.JE

Abstract

The ability to navigate in a familiar environment depends on both an intact mental representation of allocentric spatial information and the integrity of systems supporting complementary egocentric representations. Although the hippocampus has been implicated in learning new allocentric spatial information, converging evidence suggests that the posterior parietal cortex (PPC) might support egocentric representations. To date, however, few studies have examined long-standing egocentric representations of environments learned long ago. Here we tested 7 patients with focal lesions in PPC and 12 normal controls in remote spatial memory tasks, including 2 tasks reportedly reliant on allocentric representations (distance and proximity judgments) and 2 tasks reportedly reliant on egocentric representations (landmark sequencing and route navigation; see Rosenbaum, Ziegler, Winocur, Grady, & Moscovitch, 2004). Patients were unimpaired in distance and proximity judgments. In contrast, they all failed in route navigation, and left-lesioned patients also showed marginally impaired performance in landmark sequencing. Patients' subjective experience associated with navigation was impoverished and disembodied compared with that of the controls. These results suggest that PPC is crucial for accessing remote spatial memories within an egocentric reference frame that enables both navigation and reexperiencing. Additionally, PPC was found to be necessary to implement specific aspects of allocentric navigation with high demands on spontaneous retrieval.

Authors+Show Affiliations

Rotman Research Institute, Toronto, Ontario, Canada. eciaramelli@rotman-baycrest.on.caNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20438261

Citation

Ciaramelli, Elisa, et al. "Mental Space Travel: Damage to Posterior Parietal Cortex Prevents Egocentric Navigation and Reexperiencing of Remote Spatial Memories." Journal of Experimental Psychology. Learning, Memory, and Cognition, vol. 36, no. 3, 2010, pp. 619-34.
Ciaramelli E, Rosenbaum RS, Solcz S, et al. Mental space travel: damage to posterior parietal cortex prevents egocentric navigation and reexperiencing of remote spatial memories. J Exp Psychol Learn Mem Cogn. 2010;36(3):619-34.
Ciaramelli, E., Rosenbaum, R. S., Solcz, S., Levine, B., & Moscovitch, M. (2010). Mental space travel: damage to posterior parietal cortex prevents egocentric navigation and reexperiencing of remote spatial memories. Journal of Experimental Psychology. Learning, Memory, and Cognition, 36(3), 619-34. https://doi.org/10.1037/a0019181
Ciaramelli E, et al. Mental Space Travel: Damage to Posterior Parietal Cortex Prevents Egocentric Navigation and Reexperiencing of Remote Spatial Memories. J Exp Psychol Learn Mem Cogn. 2010;36(3):619-34. PubMed PMID: 20438261.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mental space travel: damage to posterior parietal cortex prevents egocentric navigation and reexperiencing of remote spatial memories. AU - Ciaramelli,Elisa, AU - Rosenbaum,R Shayna, AU - Solcz,Stephanie, AU - Levine,Brian, AU - Moscovitch,Morris, PY - 2010/5/5/entrez PY - 2010/5/5/pubmed PY - 2010/8/21/medline SP - 619 EP - 34 JF - Journal of experimental psychology. Learning, memory, and cognition JO - J Exp Psychol Learn Mem Cogn VL - 36 IS - 3 N2 - The ability to navigate in a familiar environment depends on both an intact mental representation of allocentric spatial information and the integrity of systems supporting complementary egocentric representations. Although the hippocampus has been implicated in learning new allocentric spatial information, converging evidence suggests that the posterior parietal cortex (PPC) might support egocentric representations. To date, however, few studies have examined long-standing egocentric representations of environments learned long ago. Here we tested 7 patients with focal lesions in PPC and 12 normal controls in remote spatial memory tasks, including 2 tasks reportedly reliant on allocentric representations (distance and proximity judgments) and 2 tasks reportedly reliant on egocentric representations (landmark sequencing and route navigation; see Rosenbaum, Ziegler, Winocur, Grady, & Moscovitch, 2004). Patients were unimpaired in distance and proximity judgments. In contrast, they all failed in route navigation, and left-lesioned patients also showed marginally impaired performance in landmark sequencing. Patients' subjective experience associated with navigation was impoverished and disembodied compared with that of the controls. These results suggest that PPC is crucial for accessing remote spatial memories within an egocentric reference frame that enables both navigation and reexperiencing. Additionally, PPC was found to be necessary to implement specific aspects of allocentric navigation with high demands on spontaneous retrieval. SN - 1939-1285 UR - https://www.unboundmedicine.com/medline/citation/20438261/Mental_space_travel:_damage_to_posterior_parietal_cortex_prevents_egocentric_navigation_and_reexperiencing_of_remote_spatial_memories_ L2 - http://content.apa.org/journals/xlm/36/3/619 DB - PRIME DP - Unbound Medicine ER -