Although his ability to speak is otherwise normal,a stroke patient 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

Quizplus · Accepted Answer

The best choice would be to use fMRI to compare the activity of the patient's brain and that of normal volunteers when presented with pictures of various tools. This would allow the doctor to pinpoint the area of the brain that is not functioning properly. Option A is not a viable option as it involves injecting the patient with horseradish peroxidase and conducting an autopsy, which cannot be performed while the patient is alive. Option B can show the area of the brain that is damaged, but it cannot indicate which particular function is affected. Option D can be risky and invasive for the patient and may cause further damage to the brain.

Although His Ability to Speak Is Otherwise Normal,a Stroke Patient