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Figure 3a: shows typical
activation patterns obtained during silently speaking a letter name
(two left panels), and overtly speaking a letter name (two right panels).
Broca’s area was activated in both conditions, but to a larger extent
in the overt condition (right, top panel). The middle and inferior
portions of the primary motor cortex (MLT-PMC and IV-PMC) were activated
bilaterally during overtly speaking a letter name, but not during
silently speaking a letter name. |
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Right |
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Figure 3b: shows typical
activation patterns observed during silently generating an animal
name (two left panels) and overtly generating an animal name (two
right panels). Note that Broca’s area was not activated during
overt animal-name generation (right, top panel), but was activated
to a large extent during silent animal-name generation (left,
top panel). Broca’s right homologue (RH) varied in the opposite
direction, showing greater activation during overt speech than
silent speech. |
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