When researchers use needle electrodes:
A)general anesthesia is used because the brain is sensitive to pain.
B)they inject a glucose-like substance containing a radioactive element.
C)a current is produced that is 40,000 times greater than the earth's natural magnetic field.
D)only the skull and the membranes covering the brain need to be anesthetized.

Question

Quizplus · Accepted Answer

When researchers use needle electrodes, only the skull and the membranes covering the brain need to be anesthetized. The electrodes themselves do not cause pain or discomfort as they are inserted through the anesthetized areas. Options A, B, and C are unrelated to the use of needle electrodes in brain research.

When Researchers Use Needle Electrodes