BIOMAT Database Logo BIOMAT Database Logo

BOLD signal change and contrast reversing frequency: an event-related fMRI study in human primary visual cortex. 2014

Pei Sun, and Jianfei Guo, and Shichun Guo, and Jingyi Chen, and Le He, and Shimin Fu
Department of Psychology, School of Social Sciences, Tsinghua University, Beijing, China; Laboratory for Cognitive Brain Mapping, RIKEN Brain Science Institute, 2-1 Hirosawa, Wako, Saitama, Japan.

It is believed that human primary visual cortex (V1) increases activity with increasing temporal frequency of a visual stimulus. Two kinds of visual stimulus were used in the previous studies, one is patterned-flash stimulus with a fixed onset period and an increasing average luminance with the increase of temporal frequency, the other is contrast reversing flickering checkerboard or grating with a constant average luminance across different temporal frequencies. That hemodynamic responses change as a function of reversal frequency of contrast reversing checkerboard is at odds with neurophysiological studies in animals and neuroimaging studies in humans. In the present study, we addressed the relationship between reversal frequency of contrast reversing checkerboard and hemodynamic response in human V1 using an event-related experimental paradigm and found that the transient characteristics of blood oxygenation level dependent response in human V1 depended very little on the reversal frequency of a contrast reversing checkerboard.

UI MeSH Term Description Entries
D008279 Magnetic Resonance Imaging Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques. Chemical Shift Imaging,MR Tomography,MRI Scans,MRI, Functional,Magnetic Resonance Image,Magnetic Resonance Imaging, Functional,Magnetization Transfer Contrast Imaging,NMR Imaging,NMR Tomography,Tomography, NMR,Tomography, Proton Spin,fMRI,Functional Magnetic Resonance Imaging,Imaging, Chemical Shift,Proton Spin Tomography,Spin Echo Imaging,Steady-State Free Precession MRI,Tomography, MR,Zeugmatography,Chemical Shift Imagings,Echo Imaging, Spin,Echo Imagings, Spin,Functional MRI,Functional MRIs,Image, Magnetic Resonance,Imaging, Magnetic Resonance,Imaging, NMR,Imaging, Spin Echo,Imagings, Chemical Shift,Imagings, Spin Echo,MRI Scan,MRIs, Functional,Magnetic Resonance Images,Resonance Image, Magnetic,Scan, MRI,Scans, MRI,Shift Imaging, Chemical,Shift Imagings, Chemical,Spin Echo Imagings,Steady State Free Precession MRI
D008297 Male Males
D010100 Oxygen An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration. Dioxygen,Oxygen-16,Oxygen 16
D005071 Evoked Potentials Electrical responses recorded from nerve, muscle, SENSORY RECEPTOR, or area of the CENTRAL NERVOUS SYSTEM following stimulation. They range from less than a microvolt to several microvolts. The evoked potential can be auditory (EVOKED POTENTIALS, AUDITORY), somatosensory (EVOKED POTENTIALS, SOMATOSENSORY), visual (EVOKED POTENTIALS, VISUAL), or motor (EVOKED POTENTIALS, MOTOR), or other modalities that have been reported. Event Related Potential,Event-Related Potentials,Evoked Potential,N100 Evoked Potential,P50 Evoked Potential,N1 Wave,N100 Evoked Potentials,N2 Wave,N200 Evoked Potentials,N3 Wave,N300 Evoked Potentials,N4 Wave,N400 Evoked Potentials,P2 Wave,P200 Evoked Potentials,P50 Evoked Potentials,P50 Wave,P600 Evoked Potentials,Potentials, Event-Related,Event Related Potentials,Event-Related Potential,Evoked Potential, N100,Evoked Potential, N200,Evoked Potential, N300,Evoked Potential, N400,Evoked Potential, P200,Evoked Potential, P50,Evoked Potential, P600,Evoked Potentials, N100,Evoked Potentials, N200,Evoked Potentials, N300,Evoked Potentials, N400,Evoked Potentials, P200,Evoked Potentials, P50,Evoked Potentials, P600,N1 Waves,N2 Waves,N200 Evoked Potential,N3 Waves,N300 Evoked Potential,N4 Waves,N400 Evoked Potential,P2 Waves,P200 Evoked Potential,P50 Waves,P600 Evoked Potential,Potential, Event Related,Potential, Event-Related,Potential, Evoked,Potentials, Event Related,Potentials, Evoked,Potentials, N400 Evoked,Related Potential, Event,Related Potentials, Event,Wave, N1,Wave, N2,Wave, N3,Wave, N4,Wave, P2,Wave, P50,Waves, N1,Waves, N2,Waves, N3,Waves, N4,Waves, P2,Waves, P50
D005260 Female Females
D006439 Hemodynamics The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM. Hemodynamic
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D012815 Signal Processing, Computer-Assisted Computer-assisted processing of electric, ultrasonic, or electronic signals to interpret function and activity. Digital Signal Processing,Signal Interpretation, Computer-Assisted,Signal Processing, Digital,Computer-Assisted Signal Interpretation,Computer-Assisted Signal Interpretations,Computer-Assisted Signal Processing,Interpretation, Computer-Assisted Signal,Interpretations, Computer-Assisted Signal,Signal Interpretation, Computer Assisted,Signal Interpretations, Computer-Assisted,Signal Processing, Computer Assisted
D013997 Time Factors Elements of limited time intervals, contributing to particular results or situations. Time Series,Factor, Time,Time Factor

Related Publications

Pei Sun, and Jianfei Guo, and Shichun Guo, and Jingyi Chen, and Le He, and Shimin Fu
Signal sources in bold contrast fMRI.
January 1997, Advances in experimental medicine and biology,
Pei Sun, and Jianfei Guo, and Shichun Guo, and Jingyi Chen, and Le He, and Shimin Fu
Comparison of the experimental BOLD signal change in event-related fMRI with the balloon model.
January 2001, NMR in biomedicine,
Pei Sun, and Jianfei Guo, and Shichun Guo, and Jingyi Chen, and Le He, and Shimin Fu
Perirhinal cortex activity during visual object discrimination: an event-related fMRI study.
October 2006, NeuroImage,
Pei Sun, and Jianfei Guo, and Shichun Guo, and Jingyi Chen, and Le He, and Shimin Fu
Effect of luminance contrast on BOLD fMRI response in human primary visual areas.
April 1998, Journal of neurophysiology,
Pei Sun, and Jianfei Guo, and Shichun Guo, and Jingyi Chen, and Le He, and Shimin Fu
Transient activity in the human calcarine cortex during visual-mental imagery: an event-related fMRI study.
January 2000, Journal of cognitive neuroscience,
Pei Sun, and Jianfei Guo, and Shichun Guo, and Jingyi Chen, and Le He, and Shimin Fu
Comparison of Neurochemical and BOLD Signal Contrast Response Functions in the Human Visual Cortex.
October 2019, The Journal of neuroscience : the official journal of the Society for Neuroscience,
Pei Sun, and Jianfei Guo, and Shichun Guo, and Jingyi Chen, and Le He, and Shimin Fu
Sex differences in response to red and blue light in human primary visual cortex: a bold fMRI study.
December 2000, Psychiatry research,
Pei Sun, and Jianfei Guo, and Shichun Guo, and Jingyi Chen, and Le He, and Shimin Fu
Signal-, set- and movement-related activity in the human brain: an event-related fMRI study.
January 1999, Cerebral cortex (New York, N.Y. : 1991),
Pei Sun, and Jianfei Guo, and Shichun Guo, and Jingyi Chen, and Le He, and Shimin Fu
The fMRI BOLD signal tracks electrophysiological spectral perturbations, not event-related potentials.
February 2012, NeuroImage,
Pei Sun, and Jianfei Guo, and Shichun Guo, and Jingyi Chen, and Le He, and Shimin Fu
In contrast to BOLD: signal enhancement by extravascular water protons as an alternative mechanism of endogenous fMRI signal change.
October 2010, Magnetic resonance imaging,
Copied contents to your clipboard!