Transient global amnesia: concomitant episodic memory and positron emission tomography assessment in two additional patients

2002 ◽  
Vol 325 (1) ◽  
pp. 62-66 ◽  
Author(s):  
B Guillery ◽  
B Desgranges ◽  
V de la Sayette ◽  
B Landeau ◽  
F Eustache ◽  
...  
Keyword(s):  
Positron Emission Tomography ◽  
Episodic Memory ◽  
Transient Global Amnesia ◽  
Emission Tomography ◽  
Positron Emission ◽  
Global Amnesia

The Effect of Divided Attention on Encoding and Retrieval in Episodic Memory Revealed by Positron Emission Tomography

2000 ◽  
Vol 12 (2) ◽  
pp. 267-280 ◽  
Author(s):  
Tetsuya Iidaka ◽  
Nicole D. Anderson ◽  
Shitij Kapur ◽  
Roberto Cabez ◽  
Fergus I. M. Craik
Keyword(s):  
Positron Emission Tomography ◽  
Prefrontal Cortex ◽  
Episodic Memory ◽  
Divided Attention ◽  
Memory Performance ◽  
Memory Task ◽  
Anterior Cingulate ◽  
Emission Tomography ◽  
Positron Emission ◽  
Encoding And Retrieval

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.

The Role of the Basal Forebrain in Episodic Memory Retrieval: A Positron Emission Tomography Study

NeuroImage ◽  
2002 ◽  
Vol 15 (3) ◽  
pp. 501-508 ◽  
Author(s):  
Toshikatsu Fujii ◽  
Jiro Okuda ◽  
Takashi Tsukiura ◽  
Hiroya Ohtake ◽  
Rina Miura ◽  
...  
Keyword(s):  
Positron Emission Tomography ◽  
Episodic Memory ◽  
Basal Forebrain ◽  
Memory Retrieval ◽  
Emission Tomography ◽  
Positron Emission Tomography Study ◽  
Positron Emission

Semantic and episodic memory of music: A positron emission tomography study

NeuroImage ◽  
2001 ◽  
Vol 13 (6) ◽  
pp. 727 ◽  
Author(s):  
Hervé Platel ◽  
Jean-Claude Baron ◽  
Béatrice Desgranges ◽  
Frédéric Bernard ◽  
Francis Eustache
Keyword(s):  
Positron Emission Tomography ◽  
Episodic Memory ◽  
Emission Tomography ◽  
Positron Emission Tomography Study ◽  
Positron Emission
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