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Analysis of Event-related Response in Human Visual Cortex with fMRI

Authors: Ayesha Zaman, Tanvir Atahary, Shahida Rafiq

Abstract:

Functional Magnetic Resonance Imaging(fMRI) is a noninvasive imaging technique that measures the hemodynamic response related to neural activity in the human brain. Event-related functional magnetic resonance imaging (efMRI) is a form of functional Magnetic Resonance Imaging (fMRI) in which a series of fMRI images are time-locked to a stimulus presentation and averaged together over many trials. Again an event related potential (ERP) is a measured brain response that is directly the result of a thought or perception. Here the neuronal response of human visual cortex in normal healthy patients have been studied. The patients were asked to perform a visual three choice reaction task; from the relative response of each patient corresponding neuronal activity in visual cortex was imaged. The average number of neurons in the adult human primary visual cortex, in each hemisphere has been estimated at around 140 million. Statistical analysis of this experiment was done with SPM5(Statistical Parametric Mapping version 5) software. The result shows a robust design of imaging the neuronal activity of human visual cortex.

Keywords: Echo Planner Imaging, Event related Response, General Linear Model, Visual Neuronal Response.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1061210

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References:


[1] Rosen BR, Buckner RL, Dale AM (1998). "Event-related functional MRI: past, present, and future." Proc Natl Acad Sci USA 95:773-780.
[2] Marc A. Burock, Randy L. Buckner, Marty G. Woldorff, Bruce R. Rosen, Anders M. Dale (19 November,1998). "Randomized eventrelated experimental designs allow for extremely rapid presentation rates using functional MRI." Brain Imaging Neuroreport: 3735-3739.
[3] Visual Cortex, Available: http://en.wikipedia.org/wiki/Visual_cortex
[4] Participants, Available: http://www.fmridc.org/f/fmridc/protege/exp_protocols.html?uid=912265
[5] Visual Single Task: Available: http://www.fmridc.org/f/fmridc/protege/exp_protocols.html?uid=912269
[6] Scanning Procedure: Available http://www.fmridc.org/f/fmridc/protege/scanner_protocols.html?uid=47 6463
[7] Scanning Procedure: Available: http://www.fmridc.org/f/fmridc/protege/scanner_protocols.html?uid=47 6464
[8] Preprocessing:Available http://www.fil.ion.ucl.ac.uk/spm
[9] SPM5Manual:Available http://www.fil.ion.ucl.ac.uk/spm/doc/manual.pdf
[10] Rafael C. Gonzalez, Richard E. Woods (2002). Digital Image Processing. Pearson Education Inc: 110-120.
[11] Petter Jezzard, Paul M.Mathews, Stephen M. Smith(2001). Functional MRI-An Introduction to Methods. Oxford University Press: 180-186.
[12] R. Henson, W. Penny(2005). "ANOVAs and SPM."
[13] F-Test: Avaiable : http://en.wikipedia.org/wiki/F-test
[14] Petter Jezzard, Paul M.Mathews, Stephen M. Smith(2001). Functional MRI-An Introduction to Methods. Oxford University Press: 220-222