Question at position 8 To generate a structural image of the human brain, researchers typically use:To generate a structural image of the human brain, researchers typically use:electromyogram (EMG)electroencephalogram (EEG)positron emission tomography (PET)magnetic resonance image (MRI)Clear my selection

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BlackTom AI · Accepted Answer

When considering how to generate a structural image of the human brain, it helps to recall what each technique primarily measures and what kind of image it yields.
Option 1: electromyogram (EMG). EMG records electrical activity of muscles, not brain anatomy, so it is not used to create a structural image of the brain itself. This makes it unsuitable for anatomical imaging purposes.
Option 2: electroencephalogram (EEG). EEG measures electrical activity of neuronal populations on the scalp and provides temporal information about brain activity, but it has limited spatial resolution and does not produce a detailed structural image of brain anatomy. Therefore, it is not the method for structural brain imaging.
Option 3: positron emission tomography (PET). PET images functional processes by showing metabolic activity, not detailed anatomy. While PET can be combined with CT or MRI for localization, on its own it is a functional imaging modality rather than a structural one. Hence, it does not fulfill the requirement of a structural image.
Option 4: magnetic resonance image (MRI). MRI uses strong magnetic fields and radiofrequency pulses to produce high-resolution images of brain anatomy, allowing detailed structural visualization of gray and white matter, sulci, and other anatomical features. This makes MRI the standard choice for generating structural images of the brain.
In summary, the options contrast functional versus structural imaging: EMG and EEG focus on activity rather than anatomy, PET emphasizes metabolic function, while MRI directly provides detailed anatomical structure. The structural imaging goal points toward MRI as the appropriate technique.

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