Characterizing Task Related Temporal Dynamics of Spatial Activation Distributions in fMRI BOLD Signals 1st edition by Bernard Ng, Rafeef Abugharbieh, Samantha Palmer, Martin McKeown ISBN 9783540757573

Characterizing Task-Related Temporal Dynamics of Spatial Activation Distributions in fMRI BOLD Signals 1st Edition by Bernard Ng, Rafeef Abugharbieh, Samantha Palmer, Martin McKeown – Ebook PDF Instant Download/Delivery. 9783540757573
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ISBN 10: 
ISBN 13: 9783540757573
Author: Bernard Ng, Rafeef Abugharbieh, Samantha Palmer, Martin McKeown

We present a new functional magnetic resonance imaging (fMRI) analysis method that incorporates both spatial and temporal dynamics of blood-oxygen-level dependent (BOLD) signals within a region of interest (ROI). 3D moment descriptors are used to characterize the spatial changes in BOLD signals over time. The method is tested on fMRI data collected from eight healthy subjects performing a bulb-squeezing motor task with their right-hand at various frequencies. Multiple brain regions including the left cerebellum, both primary motor cortices (M1), both supplementary motor areas (SMA), left prefrontal cortex (PFC), and left anterior cingulate cortex (ACC) demonstrate significant task-related changes. Furthermore, our method is able to discriminate differences in activation patterns at the various task frequencies, whereas using a traditional intensity based method, no significant activation difference is detected. This suggests that temporal dynamics of the spatial distribution of BOLD signal provide additional information regarding task-related activation thus complementing conventional intensity-based approaches.

Characterizing Task-Related Temporal Dynamics of Spatial Activation Distributions in fMRI BOLD Signals 1st Table of contents:

• Introduction
  1.1 Motivation and Background
  1.2 Problem Definition and Research Questions
  1.3 Key Contributions
  1.4 Structure of the Paper

• Preliminaries
  2.1 Functional Magnetic Resonance Imaging (fMRI) and BOLD Signals
  2.2 Temporal and Spatial Characteristics of fMRI Signals
  2.3 Task-Related Brain Activity and Activation Maps
  2.4 Overview of Techniques for Analyzing fMRI Data

• Understanding Spatial Activation Distributions in fMRI
  3.1 Brain Regions Involved in Task-Specific Activation
  3.2 Characterization of Spatial Activation Patterns
  3.3 Methods for Mapping Spatial Distributions of Activation
  3.4 Challenges in Identifying Task-Specific Activation

• Temporal Dynamics of fMRI BOLD Signals
  4.1 The Temporal Evolution of Brain Activity in fMRI
  4.2 Temporal Resolution and Variability in BOLD Responses
  4.3 Techniques for Temporal Analysis of fMRI Data
  4.4 Relationship Between Task Timing and Temporal Activation Patterns

• Task-Related Temporal Dynamics
  5.1 The Impact of Task Modality on Temporal Dynamics
  5.2 Modeling Task-Related Temporal Changes in Activation
  5.3 Interactions Between Task Phases and Temporal Activation
  5.4 Synchronization and Latency of Task-Related BOLD Responses

• Analysis Techniques for Characterizing Temporal Dynamics
  6.1 Data Preprocessing for Temporal Analysis of fMRI
  6.2 Temporal Filtering and Signal Extraction
  6.3 Statistical Approaches for Temporal Dynamics Analysis
  6.4 Machine Learning Techniques for Temporal Pattern Recognition

• Results and Findings
  7.1 Experimental Setup and Data Acquisition
  7.2 Temporal and Spatial Patterns of Activation During Tasks
  7.3 Task-Specific Temporal Dynamics and Activation Distributions
  7.4 Comparison with Existing Models and Methods

• Discussion
  8.1 Insights on Task-Related Temporal Dynamics
  8.2 Implications for Brain-Computer Interaction and Cognitive Neuroscience
  8.3 Limitations and Future Directions
  8.4 Open Questions and Potential for Further Research

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