Top-down and bottom-up fMRI BOLD signal changes in response to selective attention during mechanical pressure pain

2005 ◽  
Vol 6 (3) ◽  
pp. S6
Author(s):  
T. Papageorgiou ◽  
E. Jackson ◽  
K. Anderson ◽  
S. Mahankali ◽  
C. Cleeland
Keyword(s):  
Selective Attention ◽  
Bold Signal ◽  
Top Down ◽  
Mechanical Pressure ◽  
Bottom Up ◽  
Pressure Pain ◽  
Signal Changes

Age-Related Changes in Selective Attention in the Very Old: A Bottom-Up or Top-Down Problem? (IN4-2.005)

Neurology ◽  
2012 ◽  
Vol 78 (Meeting Abstracts 1) ◽  
pp. IN4-2.005-IN4-2.005
Author(s):  
T. Zhuravleva ◽  
A. Haring ◽  
B. Alperin ◽  
P. Holcomb ◽  
D. Rentz ◽  
...  
Keyword(s):  
Selective Attention ◽  
Top Down ◽  
Bottom Up ◽  
Very Old ◽  
Age Related ◽  
Age Related Changes

Age-Related Changes in Selective Attention in the Very Old: A Bottom-Up or Top-Down Problem? (S44.003)

Neurology ◽  
2012 ◽  
Vol 78 (Meeting Abstracts 1) ◽  
pp. S44.003-S44.003
Author(s):  
T. Zhuravleva ◽  
A. Haring ◽  
B. Alperin ◽  
P. Holcomb ◽  
D. Rentz ◽  
...  
Keyword(s):  
Selective Attention ◽  
Top Down ◽  
Bottom Up ◽  
Very Old ◽  
Age Related ◽  
Age Related Changes

scholarly journals Laminar specific fMRI reveals directed interactions in distributed networks during language processing

2019 ◽  
Vol 116 (42) ◽  
pp. 21185-21190 ◽  
Author(s):  
Daniel Sharoh ◽  
Tim van Mourik ◽  
Lauren J. Bains ◽  
Katrien Segaert ◽  
Kirsten Weber ◽  
...  
Keyword(s):  
Language Processing ◽  
Word Reading ◽  
Brain Regions ◽  
Distributed Networks ◽  
Signal Pathways ◽  
Bold Signal ◽  
Bold Response ◽  
Top Down ◽  
Bottom Up ◽  
Connectivity Patterns

Interactions between top-down and bottom-up information streams are integral to brain function but challenging to measure noninvasively. Laminar resolution, functional MRI (lfMRI) is sensitive to depth-dependent properties of the blood oxygen level-dependent (BOLD) response, which can be potentially related to top-down and bottom-up signal contributions. In this work, we used lfMRI to dissociate the top-down and bottom-up signal contributions to the left occipitotemporal sulcus (LOTS) during word reading. We further demonstrate that laminar resolution measurements could be used to identify condition-specific distributed networks on the basis of whole-brain connectivity patterns specific to the depth-dependent BOLD signal. The networks corresponded to top-down and bottom-up signal pathways targeting the LOTS during word reading. We show that reading increased the top-down BOLD signal observed in the deep layers of the LOTS and that this signal uniquely related to the BOLD response in other language-critical regions. These results demonstrate that lfMRI can reveal important patterns of activation that are obscured at standard resolution. In addition to differences in activation strength as a function of depth, we also show meaningful differences in the interaction between signals originating from different depths both within a region and with the rest of the brain. We thus show that lfMRI allows the noninvasive measurement of directed interaction between brain regions and is capable of resolving different connectivity patterns at submillimeter resolution, something previously considered to be exclusively in the domain of invasive recordings.

Psychology and Culture: Top Down Versus Bottom Up?

PsycCRITIQUES ◽  
2005 ◽  
Vol 50 (19) ◽  
Author(s):  
Michael Cole
Keyword(s):  
Top Down ◽  
Bottom Up
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