In a Recent Study (Petrovic, Kalso, Peterson & Ingvar, 2002)

Multiple Choice

In a recent study (Petrovic, Kalso, Peterson & Ingvar, 2002) , subjects were exposed to a painful stimulus (heat to the hand) under three conditions: opiate medication, placebo (sugar pill) medication, and no medication. Brain scans indicated that a subject's experience of reduced pain with the placebo is due to

A) activation of brain regions identical to those activated by opiate medication.
B) activation of brain regions that are overlapping, but not identical, to those activated by opiate medication.
C) psychological expectation since a placebo does not activate brain regions associated with pain control.
D) similarities in activated brain regions during the "no medication" condition.