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How Brain Activity Is Measured

How Brain Activity Is Measured


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Functional Magnetic Resonance Imaging (fMRI) And How It Works

The fMRI employs a magnetic field to collect information about the body. It is one of the most prominent methods in neuroscience for studying the structure of the brain, including differences in the structural characteristics of different people's brains.

It works with a s...

  • The BOLD signal stands for blood-oxygen-level dependent. This is a brain imaging signal that shows whether the level of oxygen in the parts of the brain increasing or decreasing.
  • The fMRI is used to explore how brains function with different psychi...

Electroencephalography (EEG)

  • The EEG is used to measure the electrical activities of the brain. The process is non-invasive and is done through the scalp with flat metal electrodes.
  • Though due to its non-invasiveness what it shows is relatively limited, but regardless it is a ...

The use of EEG allows further research on the following:

  • Memory processing during sleep
  • Mental illness
  • Providing further evidence in the differences in reward processing with those who suffer from mental illness

Moreover, the EEG has a mobile version "...

Emission Computed Tomography (ECT)

Emission Computed Tomography is the most invasive method for brain imaging. Its name comes from the emission of radioactive energy by tracers injected into the blood - which is a signature aspect of this approach to understanding the brain.

The two...

To use the ECT method is to inject radioactive atoms into the person's bloodstream and have them circulated into the brain. The energy emitted is monitored by external devices that provide information about their concentration in the brain. Lastly, a mathematical model allows the data on radiatio...

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