Increasing mean airway pressure reduces functional MRI (fMRI) signal in the primary visual cortex

2001 ◽  
Vol 19 (1) ◽  
pp. 7-11 ◽  
Author(s):  
Ingo H. Lorenz ◽  
Christian Kolbitsch ◽  
Christoph Hörmann ◽  
Michael Schocke ◽  
Christian Kremser ◽  
...  
Keyword(s):  
Visual Cortex ◽  
Functional Mri ◽  
Primary Visual Cortex ◽  
Airway Pressure ◽  
Mean Airway Pressure ◽  
Fmri Signal

scholarly journals Shape Processing Area LO and Illusory Contours

Perception ◽  
10.1068/p6388 ◽  
2009 ◽  
Vol 38 (8) ◽  
pp. 1260-1263 ◽  
Author(s):  
Lee H de-Wit ◽  
Robert W Kentridge ◽  
A David Milner
Keyword(s):  
Visual Cortex ◽  
Functional Mri ◽  
Primary Visual Cortex ◽  
Visual Illusions ◽  
Visual Area ◽  
Illusory Contours ◽  
Feedback Effects ◽  
Shape Representations ◽  
Shape Processing

Recent functional MRI has demonstrated that illusory contours can activate the primary visual cortex. Our investigation sought to demonstrate whether this correlation reflects computations performed in the primary visual cortex or feedback effects from shape processing area LO. We explored this in a patient who has a bilateral lesion to LO, but a functionally spared V1. Our data indicate that illusory contours are unable to influence behaviour without visual area LO. Whilst we would not claim that our data provide evidence for the ‘cognitive’ nature of illusory contours, they certainly suggest that illusory contours are dependent upon the computations involved in extracting shape representations in LO. Our data highlight the importance of neuropsychological research in interpreting the role of feedforward and feedback effects in the generation of visual illusions.

scholarly journals Functional MRI reveals spatially specific attentional modulation in human primary visual cortex

1999 ◽  
Vol 96 (4) ◽  
pp. 1663-1668 ◽  
Author(s):  
D. C. Somers ◽  
A. M. Dale ◽  
A. E. Seiffert ◽  
R. B. H. Tootell
Keyword(s):  
Visual Cortex ◽  
Functional Mri ◽  
Primary Visual Cortex ◽  
Attentional Modulation

scholarly journals Effects of phase regression on high-resolution functional MRI of the primary visual cortex

NeuroImage ◽  
2021 ◽  
Vol 227 ◽  
pp. 117631
Author(s):  
Olivia W Stanley ◽  
Alan B Kuurstra ◽  
L Martyn Klassen ◽  
Ravi S Menon ◽  
Joseph S Gati
Keyword(s):  
Visual Cortex ◽  
High Resolution ◽  
Functional Mri ◽  
Primary Visual Cortex

Altered Functional Connectivity of the Primary Visual Cortex in Adult Comitant Strabismus: A Resting-State Functional MRI Study

2018 ◽  
Vol 44 (3) ◽  
pp. 316-323 ◽  
Author(s):  
Xiaohe Yan ◽  
Yun Wang ◽  
Lijuan Xu ◽  
Yong Liu ◽  
Shaojie Song ◽  
...  
Keyword(s):  
Visual Cortex ◽  
Functional Connectivity ◽  
Functional Mri ◽  
Primary Visual Cortex ◽  
Resting State ◽  
Mri Study
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