Applications of Functional Brain Imaging Techniques in Brain Cognition

A special issue of Bioengineering (ISSN 2306-5354). This special issue belongs to the section "Biosignal Processing".

Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 1211

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Guest Editor
Imaging Division, Lawson Health Research Institute, London, ON, Canada
Interests: brain imaging; biomedical optics; functional neuroimaging; fNIRS; diffuse correlation spectroscopy; biomedical signal processing
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Dear Colleagues,

In recent years, functional brain imaging techniques have become increasingly prominent in neuroscience, allowing researchers to examine the neural processes underlying cognitive function more closely. These techniques measure changes in blood flow or metabolic activity within specific brain regions in response to different stimuli or tasks, providing insight into the neural networks and mechanisms involved in various aspects of perception, attention, memory, language, and decision-making.

There are several different methods used for functional brain imaging, including functional magnetic resonance imaging (fMRI), functional near-infrared spectroscopy (fNIRS), electroencephalography (EEG), positron emission tomography (PET), and magnetoencephalography (MEG). Each of these techniques has its own strengths and limitations. Still, all offer exciting possibilities for exploring the neural basis of cognition.

One of the most critical advantages of functional brain imaging is that it allows researchers to investigate brain function in real-time as participants engage in various tasks and stimuli. This has led to numerous important discoveries about the functional organization of the brain, as well as the relationships between different brain regions and cognitive processes.

Overall, the applications of functional brain imaging techniques in brain cognition are wide-ranging and diverse, with potential implications for fields such as medicine, psychology, and education. By shedding light on brain functionality, these techniques offer exciting possibilities for advancing our understanding of human cognition in both health and disease.

Dr. Daniel Milej
Guest Editor

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Keywords

  • functional brain imaging
  • cognitive neuroscience
  • brain activity mapping
  • neural networks
  • executive functions
  • brain development

Published Papers (1 paper)

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11 pages, 1909 KiB  
Article
Functional Near-Infrared Spectroscopy-Based Evidence of the Cerebral Oxygenation and Network Characteristics of Upper Limb Fatigue
by Feng Li, Jiawei Bi, Zhiqiang Liang, Lu Li, Yu Liu and Lingyan Huang
Bioengineering 2023, 10(10), 1112; https://doi.org/10.3390/bioengineering10101112 - 22 Sep 2023
Viewed by 998
Abstract
Objective: The objective of this research is to better understand the effects of upper limb fatigue on the cerebral cortex. The aim of this study was to investigate the characteristics of cerebral oxygenation and cortical functional connectivity in healthy adults after upper limb [...] Read more.
Objective: The objective of this research is to better understand the effects of upper limb fatigue on the cerebral cortex. The aim of this study was to investigate the characteristics of cerebral oxygenation and cortical functional connectivity in healthy adults after upper limb fatigue using functional near-infrared spectroscopy (fNIRS). Methods: Nineteen healthy adults participated in this study. The participants began exercising on an arm crank ergometer with no load, which was then increased by 0.2 kg per minute, maintaining a speed of at least 90 revolutions per minute during the exercise. Functional near-infrared spectroscopy covering the prefrontal cortex and motor area was used to monitor brain activity during rest and exercise. Heart rate and RPE were monitored during exercise to evaluate the degree of fatigue. Paired-sample t-tests were used to examine differences in the concentration of oxygenated hemoglobin (HbO2) and functional connectivity before and after fatigue. Results: All participants completed the exercise test that induced fatigue. We observed a significant decrease in HbO2 levels in the prefrontal and motor areas after exercise. In addition, brain network features showed a significant decrease in functional connectivity between the left and right motor cortices, between the motor and prefrontal cortices, and between both prefrontal cortices after fatigue. Conclusion: This study demonstrates that, in healthy adults, exercise-induced fatigue in the upper limbs significantly affects brain function. In particular, it leads to reduced functional connectivity between the motor cortex and the prefrontal cortex. Full article
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