PMID- 17651006 OWN - NLM STAT- MEDLINE DCOM- 20071002 LR - 20181113 IS - 0898-929X (Print) IS - 1530-8898 (Electronic) IS - 0898-929X (Linking) VI - 19 IP - 8 DP - 2007 Aug TI - "I know you are but what am I?!": neural bases of self- and social knowledge retrieval in children and adults. PG - 1323-37 AB - Previous neuroimaging research with adults suggests that the medial prefrontal cortex (MPFC) and the medial posterior parietal cortex (MPPC) are engaged during self-knowledge retrieval processes. However, this has yet to be assessed in a developmental sample. Twelve children and 12 adults (average age = 10.2 and 26.1 years, respectively) reported whether short phrases described themselves or a highly familiar other (Harry Potter) while undergoing functional magnetic resonance imaging. In both children and adults, the MPFC was relatively more active during self- than social knowledge retrieval, and the MPPC was relatively more active during social than self-knowledge retrieval. Direct comparisons between children and adults indicated that children activated the MPFC during self-knowledge retrieval to a much greater extent than adults. The particular regions of the MPPC involved varied between the two groups, with the posterior precuneus engaged by adults, but the anterior precuneus and posterior cingulate engaged by children. Only children activated the MPFC significantly above baseline during self-knowledge retrieval. Implications for social cognitive development and the processing functions performed by the MPFC are discussed. FAU - Pfeifer, Jennifer H AU - Pfeifer JH AD - Department of Psychology, University of California, Los Angeles, CA 90095, USA. jenn.pfeifer@gmail.com FAU - Lieberman, Matthew D AU - Lieberman MD FAU - Dapretto, Mirella AU - Dapretto M LA - eng GR - RR00865/RR/NCRR NIH HHS/United States GR - RR13642/RR/NCRR NIH HHS/United States GR - MH075299/MH/NIMH NIH HHS/United States GR - F31 MH075299/MH/NIMH NIH HHS/United States GR - C06 RR012169/RR/NCRR NIH HHS/United States GR - M01 RR000865/RR/NCRR NIH HHS/United States GR - P41 RR013642/RR/NCRR NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PL - United States TA - J Cogn Neurosci JT - Journal of cognitive neuroscience JID - 8910747 SB - IM MH - Adult MH - Aging/physiology/psychology MH - Brain Mapping MH - Child MH - Gyrus Cinguli/physiology MH - Humans MH - Magnetic Resonance Imaging MH - Mental Recall/*physiology MH - Parietal Lobe/*physiology MH - Prefrontal Cortex/*physiology MH - *Self Concept MH - *Social Perception PMC - PMC3407805 MID - NIHMS383071 EDAT- 2007/07/27 09:00 MHDA- 2007/10/03 09:00 PMCR- 2012/07/29 CRDT- 2007/07/27 09:00 PHST- 2007/07/27 09:00 [pubmed] PHST- 2007/10/03 09:00 [medline] PHST- 2007/07/27 09:00 [entrez] PHST- 2012/07/29 00:00 [pmc-release] AID - 10.1162/jocn.2007.19.8.1323 [doi] PST - ppublish SO - J Cogn Neurosci. 2007 Aug;19(8):1323-37. doi: 10.1162/jocn.2007.19.8.1323.