When Wilder Penfield Pioneered a Technique of Directly Stimulating Areas

When Wilder Penfield pioneered a technique of directly stimulating areas of the brain with an electrical probe and observing the behavior of the patient, he found that ______.

A) the brain itself contains a large number of nociceptors which override signals coming from within the skin
B) when he stimulated regions of somatosensory cortex, the patients had tingling experiences in specific areas along the skin
C) when he stimulated regions of posterior parietal cortex, the patients experienced pain, usually centered internally
D) patient discomfort reached such high levels that he abandoned using this technique