Penfield's Research on the Memories of Brain Surgery Patients Utilized

Multiple Choice

Penfield's research on the memories of brain surgery patients utilized electrical stimulation to produce neural firing. During this procedure the patient was completely awake and able to discuss the memories they were experiencing with Penfield. This was possible because

A) of arthroscopic surgical techniques.
B) there are no pain receptors in the brain.
C) the patients were using biofeedback techniques.
D) they already had brain damage.