sentences:  However, there have been some discrepancies with the use of this method including differences in observations when using single and multiple needles as well as the areas of where the needles are placed.Using electrical cortical mapping bilateral movements were observed in the lower facial muscles compared to unilateral movements.From anatomic studies on patients with unilateral infarction, motoneurons in the lower facial area were innervated bilaterally; however, there was predominance in contralateral areas of the lower face.