Figure 5. Statistical maps showing brain activation while participants assessed different sets of products after lying in a written note and after lying in a voicemail, respectively.

Results demonstrate activations in sensorimotor brain areas after lying in a written note only while evaluating hand soaps, not mouthwash products. In addition, results show brain activation in sensorimotor cortices after lying in a voice mail only during assessment of mouthwash products, not hand soaps. Furthermore, the involvement of the sensorimotor cortices is different with respect to the hand and the mouth area of the functional topography in SI.