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The impact of increased relational encoding demands on frontal and hippocampal function in older adults.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Leshikar, Eric D. Gutchess, Angela H. Hebrank, Andrew C. Sutton, Bradley P. Park, Denise C.
Description	Country affiliation: United States Author Affiliation: Leshikar ED ( Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL, USA.)
Abstract	In the present study, we manipulated the cognitive effort in an associative encoding task using functional magnetic resonance imaging (fMRI). Older and younger adults were presented with two objects that were either semantically related or unrelated, and were required to form a relationship between the items. Both groups self-reported greater difficulty in completing the unrelated associative encoding task providing independent evidence of the associative difficulty manipulation. On both the low and high difficulty tasks, older adults showed a typical pattern of increased right inferior frontal recruitment relative to younger adults. Of particular interest was the finding that both groups showed increased activation as task difficulty increased in the left inferior frontal gyrus and left hippocampus. Overall, the results suggest that the aging brain is characterized by greater prefrontal processing, but that as cognitive demand increases, the networks used by older and younger adults are the largely the same.
File Format	HTM / HTML
ISSN	00109452
e-ISSN	19738102
DOI	10.1016/j.cortex.2009.07.011
Journal	Cortex
Issue Number	4
Volume Number	46
Language	English
Publisher	Elsevier
Publisher Date	2010-04-01
Publisher Place	Italy
Access Restriction	Open
Subject Keyword	Discipline Neuroscience Discipline Cognitive Science Discipline Neuropsychology Discipline Neurology Discipline Psychology Aging Physiology Frontal Lobe Hippocampus Memory Adolescent Brain Magnetic Resonance Imaging Neural Pathways Neuropsychological Tests Research Support, N.i.h., Extramural
Content Type	Text
Resource Type	Article
Subject	Neurology Experimental and Cognitive Psychology Cognitive Neuroscience Developmental and Educational Psychology Neurology (clinical) Neuropsychology and Physiological Psychology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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