Plate 5 Selected PET CBF activation sites associated with processing of tonal melodies. The figures show
averaged PET subtraction images superimposed on a corresponding section of an average anatomical MRI. (To p)
Horizontal, coronal, and sagittal views through a focus located in the right superior temporal gyrus representing
a significant blood flow increase while subjects listened to a series of short, unfamiliar tonal melodies, as com-
pared with a baseline condition in which they listened to noise bursts that were acoustically equated to the
melodies. Also visible in the horizontal section is a region of significant activity in the left temporal cortex.
(Bottom) Horizontal, coronal, and sagittal views through a focus in the right frontal/opercular region showing
activity associated with making judgements about the pitch of the first and last notes of the tonal sequences as
compared to making judgements about the first two notes. Data reanalysed from Zatorre et al.
Plate 6 Significant blood flow activations in auditory (temporal) cortex specific to playing the Bach score (red),
specific to playing scales (blue), and common to both performances (cyan). These are logical contrasts of Bach vs
rest and scales vs rest shown in group-averaged PET images overlaid on anatomical magnetic resonance images
(MRIs). The z-values indicate the axial height of the brain volume relative to the Talairach and Tournoux stereo-
tactic atlas. Throughout, left side of brain images shows the left side of the brain, and vice versa.