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26 results on '"Keil, K"'

2. Northwest Africa 773: Lunar origin and iron-enrichment trend

Author

Fagan, T. J., primary, Taylor, G. J., additional, Keil, K., additional, Hicks, T. L., additional, Killgore, M., additional, Bunch, T. E., additional, Wittke, J. H., additional, Mittlefehldt, D. W., additional, Clayton, R. N., additional, Mayeda, T. K., additional, Eugster, O., additional, Lorenzetti, S., additional, and Norman, M. D., additional

Published
2003
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3. Northwest Africa 032: Product of lunar volcanism

Author

Fagan, T. J., primary, Taylor, G. J., additional, Keil, K., additional, Bunch, T. E., additional, Wittke, J. H., additional, Korotev, R. L., additional, Jolliff, B. L., additional, Gillis, J. J., additional, Haskin, L. A., additional, Jarosewich, E., additional, Clayton, R. N., additional, Mayeda, T. K., additional, Fernandes, V. A., additional, Burgess, R., additional, Turner, G., additional, Eugster, O., additional, and Lorenzetti, S., additional

Published
2002
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15. Roosevelt County 075: A petrologic, chemical and isotopic study of the most unequilibrated known H chondrite

Author

McCoy, T. J., primary, Keil, K., additional, Ash, R. D., additional, Morse, A. D., additional, Pillinger, C. T., additional, Wieler, R., additional, Mayeda, T. K., additional, Clayton, R. N., additional, Benoit, P. H., additional, Sears, D. W. G., additional, Casanova, I., additional, Muenow, D. W., additional, Moore, C. B., additional, Lewis, C. F., additional, and Wilson, I. E., additional

Published
1993
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21. RAGLAND, AN LL3.4 CHONDRITE FIND FROM NEW MEXICO

Author

Recca, S.I., primary, Scott, E.R.D., additional, Keil, K., additional, Clayton, R.N., additional, Mayeda, T.K., additional, Huss, G.I, additional, Jarosewich, E., additional, Weeks, K.S., additional, Hasan, F.A., additional, Sears, D.W.G., additional, Wieler, R., additional, and Signer, P., additional

Published
1986
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25. Hippocampal complex and retrieval of recent and very remote autobiographical memories: evidence from functional magnetic resonance imaging in neurologically intact people.

Author

Ryan L, Nadel L, Keil K, Putnam K, Schnyer D, Trouard T, and Moscovitch M

Subjects
Autobiographies as Topic, Humans, Magnetic Resonance Imaging, Middle Aged, Neocortex physiology, Reference Values, Time Factors, Hippocampus physiology, Mental Recall physiology
Abstract

It has been argued that the role of the hippocampus in memory is time-limited: during a period of memory consolidation, other brain regions such as the neocortex are said to acquire the ability to support memory retention and retrieval on their own. An alternative view is that retention and retrieval of memory for autobiographical episodes depend on the hippocampal complex, regardless of the age of the memory. We examined the participation of the hippocampal complex in a functional magnetic resonance imaging (fMRI) study in which participants were asked to recollect autobiographical events that occurred either within the last 4 years or more than 20 years ago. We found equivalent levels of hippocampal activation in both conditions in all participants (N = 10). In addition, activation in neocortical regions did not differ as a function of the age of the memory, even though most of the recent memories recalled were less than 2 years old and the remote memories more than 35 years old. The results support the notion that the hippocampal complex participates in retention and recovery of even very old autobiographical memories, and place boundary conditions on theories of memory consolidation.

Published
2001
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26. Selective attention to face identity and color studied with f MRI.

Author

Clark VP, Parasuraman R, Keil K, Kulansky R, Fannon S, Maisog JM, Ungerleider LG, and Haxby JV

Abstract

Cortical areas associated with selective attention to the color and identity of faces were located using functional magnetic resonance imaging (fMRI). Six subjects performed tasks which required selective attention to face identity or color similarity using the same color-washed face stimuli. Performance of the color attention task but not the face attention task was associated with a region of activity in the collateral sulcus and nearby regions of the lingual and fusiform gyri. Performance of both tasks was associated with a region of activity in ventral occipitotemporal cortex that was lateral to the color responsive area and had a greater spatial extent. These fMRI results converge with results obtained from PET and ERP studies to demonstrate similar anatomical locations of functional areas for face and color processing across studies.

Published
1997
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