scholarly journals Cortical BOLD responses to moderate- and high-speed motion in the human visual cortex

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Kyriaki Mikellidou ◽  
Francesca Frijia ◽  
Domenico Montanaro ◽  
Vincenzo Greco ◽  
David C. Burr ◽  
...  
Keyword(s):  
Visual Cortex ◽  
High Speed ◽  
Human Visual Cortex ◽  
Bold Responses

scholarly journals Voxel-Wise Linearity Analysis of Increments and Decrements in BOLD Responses in Human Visual Cortex Using a Contrast Adaptation Paradigm

2021 ◽  
Vol 15 ◽  
Author(s):  
Yun Lin ◽  
Xi Zhou ◽  
Yuji Naya ◽  
Justin L. Gardner ◽  
Pei Sun
Keyword(s):  
Visual Cortex ◽  
Primary Visual Cortex ◽  
Bold Signal ◽  
Transient Responses ◽  
Bold Fmri ◽  
Human Visual Cortex ◽  
Contrast Adaptation ◽  
Bold Responses

The linearity of BOLD responses is a fundamental presumption in most analysis procedures for BOLD fMRI studies. Previous studies have examined the linearity of BOLD signal increments, but less is known about the linearity of BOLD signal decrements. The present study assessed the linearity of both BOLD signal increments and decrements in the human primary visual cortex using a contrast adaptation paradigm. Results showed that both BOLD signal increments and decrements kept linearity to long stimuli (e.g., 3 s, 6 s), yet, deviated from linearity to transient stimuli (e.g., 1 s). Furthermore, a voxel-wise analysis showed that the deviation patterns were different for BOLD signal increments and decrements: while the BOLD signal increments demonstrated a consistent overestimation pattern, the patterns for BOLD signal decrements varied from overestimation to underestimation. Our results suggested that corrections to deviations from linearity of transient responses should consider the different effects of BOLD signal increments and decrements.

Characterizing nonlinear BOLD responses in human visual cortex

NeuroImage ◽  
2001 ◽  
Vol 13 (6) ◽  
pp. 278
Author(s):  
Tor D. Wager ◽  
Thomas E. Nichols ◽  
Richard Bryck ◽  
John Jonides ◽  
Edward E. Smith
Keyword(s):  
Visual Cortex ◽  
Human Visual Cortex ◽  
Bold Responses

Spatial Scales of Orientation Selective BOLD Responses in the Human Visual Cortex

NeuroImage ◽  
2009 ◽  
Vol 47 ◽  
pp. S86
Author(s):  
JD Swisher ◽  
JC Gatenby ◽  
JC Gore ◽  
F Tong
Keyword(s):  
Visual Cortex ◽  
Spatial Scales ◽  
Human Visual Cortex ◽  
Bold Responses

scholarly journals Dynamic mapping of the human visual cortex by high-speed magnetic resonance imaging.

1992 ◽  
Vol 89 (22) ◽  
pp. 11069-11073 ◽  
Author(s):  
A. M. Blamire ◽  
S. Ogawa ◽  
K. Ugurbil ◽  
D. Rothman ◽  
G. McCarthy ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Visual Cortex ◽  
Magnetic Resonance ◽  
High Speed ◽  
Resonance Imaging ◽  
Human Visual Cortex ◽  
Dynamic Mapping

scholarly journals A Two-Stage Cascade Model of BOLD Responses in Human Visual Cortex

2013 ◽  
Vol 9 (5) ◽  
pp. e1003079 ◽  
Author(s):  
Kendrick N. Kay ◽  
Jonathan Winawer ◽  
Ariel Rokem ◽  
Aviv Mezer ◽  
Brian A. Wandell
Keyword(s):  
Visual Cortex ◽  
Cascade Model ◽  
Two Stage ◽  
Human Visual Cortex ◽  
Bold Responses
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