Abstract
Abstract The effects of divided attention (DA) on episodic memory encoding and retrieval were investigated in 12 normal young subjects by positron emission tomography (PET). Cerebral blood flow was measured while subjects were concurrently performing a memory task (encoding and retrieval of visually presented word pairs) and an auditory tone-discrimination task. The PET data were analyzed using multivariate Partial Least Squares (PLS), and the results revealed three sets of neural correlates related to specific task contrasts. Brain activity, relatively greater under conditions of full attention (FA) than DA, was identified in the occipital-temporal, medial, and ventral-frontal areas, whereas areas showing relatively more activity under DA than FA were found in the cerebellum, temporo-parietal, left anterior-cingulate gyrus, and bilateral dorsolateral-prefrontal areas. Regions more active during encoding than during retrieval were located in the hippocampus, temporal and the prefrontal cortex of the left hemisphere, and regions more active during retrieval than during encoding included areas in the medial and right-prefrontal cortex, basal ganglia, thalamus, and cuneus. DA at encoding was associated with specific decreases in rCBF in the left-prefrontal areas, whereas DA at retrieval was associated with decreased rCBF in a relatively small region in the right-prefrontal cortex. These different patterns of activity are related to the behavioral results, which showed a substantial decrease in memory performance when the DA task was performed at encoding, but no change in memory levels when the DA task was performed at retrieval.
References
43
Referenced
106
10.1037/0882-7974.13.3.405
10.1037/0096-3445.113.4.518
10.1097/00001756-199801050-00024
10.1523/JNEUROSCI.17-01-00391.1997
10.1162/jocn.1997.9.2.277
10.1162/jocn.1997.9.1.1
10.1523/JNEUROSCI.11-08-02383.1991
10.1037/0735-7044.108.5.848
10.1037/0096-3445.125.2.159
10.1038/378279a0
10.1038/41561
10.1214/ss/1177013815
10.1093/brain/118.2.401
10.1016/S0166-2236(96)01013-2
{'key': 'p_17', 'first-page': '1239', 'volume': '121', 'author': 'Fletcher P. C.', 'year': '1998', 'journal-title': 'I. Encoding. Brain'}
/ I. Encoding. Brain by Fletcher P. C. (1998)10.1073/pnas.95.3.906
10.1093/brain/117.6.1271
10.1006/nimg.1997.0292
10.1073/pnas.91.6.2008
10.1016/S0926-6410(96)00058-4
10.1016/S0896-6273(00)80474-2
10.1093/cercor/8.7.593
{'key': 'p_26', 'first-page': '21', 'volume': '66', 'author': 'Knight R. T.', 'year': '1995', 'journal-title': 'Advance in Neurology'}
/ Advance in Neurology by Knight R. T. (1995)10.1002/(SICI)1098-1063(1998)8:4<313::AID-HIPO1>3.0.CO;2-I
10.1006/nimg.1997.0308
10.1002/(SICI)1097-0193(1997)5:6<389::AID-HBM1>3.0.CO;2-#
10.1006/nimg.1996.0016
10.1002/(SICI)1097-0193(1997)5:6<422::AID-HBM3>3.0.CO;2-5
10.1016/S0079-6123(08)62676-X
10.1038/349061a0
10.1152/jn.1993.70.2.453
10.1093/cercor/4.1.8
10.1016/0892-0362(89)90025-1
10.1002/(SICI)1098-1063(1999)9:1<7::AID-HIPO2>3.0.CO;2-K
10.1002/(SICI)1097-0193(1996)4:3<174::AID-HBM3>3.0.CO;2-0
10.1038/368633a0
10.1162/jocn.1997.9.5.624
10.1073/pnas.91.6.2016
10.1093/cercor/6.1.71
10.1097/00001756-199811160-00026
10.1126/science.6879207
10.1097/00004728-199307000-00004
10.1523/JNEUROSCI.14-04-01908.1994
Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 27, 2002, 7:56 a.m.) |
Deposited | 4 years, 1 month ago (July 27, 2021, 12:40 p.m.) |
Indexed | 3 months, 2 weeks ago (May 20, 2025, 9:14 a.m.) |
Issued | 25 years, 6 months ago (March 1, 2000) |
Published | 25 years, 6 months ago (March 1, 2000) |
Published Online | 25 years, 6 months ago (March 1, 2000) |
Published Print | 25 years, 6 months ago (March 1, 2000) |
@article{Iidaka_2000, title={The Effect of Divided Attention on Encoding and Retrieval in Episodic Memory Revealed by Positron Emission Tomography}, volume={12}, ISSN={1530-8898}, url={http://dx.doi.org/10.1162/089892900562093}, DOI={10.1162/089892900562093}, number={2}, journal={Journal of Cognitive Neuroscience}, publisher={MIT Press - Journals}, author={Iidaka, Tetsuya and Anderson, Nicole D. and Kapur, Shitij and Cabez, Roberto and Craik, Fergus I. M.}, year={2000}, month=mar, pages={267–280} }