Although his ability to speak is otherwise normal, a patient suffering from a stroke is having difficulty naming common everyday objects, such as tools. In order to determine which part of the brain is functioning abnormally, his doctor may use which of the following techniques?
a. Inject the patient with horseradish peroxidase and look at his brain during an autopsy.
b. Do a CT scan on the brain to see what area is not functioning.
c. Use functional magnetic resonance imaging (fMRI) to compare the activity of the brains of the patient and normal volunteers when they are presented with pictures of various tools.
d. During neurosurgery on the patient, stimulate his brain to see what part is not functioning.
Question 2
Compared with positron emission tomography (PET) scans, functional magnetic resonance imaging (fMRI) provides
a. more information about brain activity.
b. better structural resolution.
c. fewer side effects.
d. more economical imaging.
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