“…1 It is argued here that although conventional frontalis electrode placement is an effective tool, it has more often been selected because of convention rather than as a consequence of empirical evidence, There is, in fact, little empirical support for the assumption that a decrement in frontalis EMG will result in a reduction elsewhere in a person's musculature, specifically in neck, corrugator or scalp muscles, areas likely to be active in chronic muscle contraction headache. 1 It is argued here that although conventional frontalis electrode placement is an effective tool, it has more often been selected because of convention rather than as a consequence of empirical evidence, There is, in fact, little empirical support for the assumption that a decrement in frontalis EMG will result in a reduction elsewhere in a person's musculature, specifically in neck, corrugator or scalp muscles, areas likely to be active in chronic muscle contraction headache.…”