Figure 3.

a: Activation by vanillin (vanillin–air contrast) (left); acetone and vanillin–common clusters (right). Activated clusters superimposed on a standard brain. The Sokoloff color scale illustrates Z‐values (0–7.5). The clusters were thresholded at 3.1. Subject's right side is to the left in the image. The Talairach coordinates are given. b: Activation by acetone (acetone–air contrast) and deactivation by acetone (air–acetone contrast). Activated clusters superimposed on a standard brain. The Sokoloff color scale illustrates Z‐values (0–7.5). Note that the color coding is reversed for the illustration of deactivation. The clusters were thresholded at 3.1. Subject's right side is to the left. The Talairach coordinates are given. c: Activation by butanol (butanol–air contrast) and deactivation by butanol (air–butanol contrast). Activated clusters superimposed on a standard brain. The Sokoloff color scale illustrates Z‐values. Note that the color coding is reversed for the illustration of deactivation. The clusters were thresholded at 2.6. Subject's right side is to the left. The Talairach coordinates are given.