Relative Shift in Activity from Medial to Lateral Frontal Cortex During Internally Versus Externally Guided Word Generation

  • Authors:

  • Bruce Crosson;Joseph R. Sadek;Leeza Maron;Didem Gökçay;Cecile M. Mohr;Edward J. Auerbach;Alan J. Freeman;Christiana M. Leonard;Richard W. Briggs

  • Affiliations:

  • University of Florida;University of Florida;University of Florida;University of Florida;University of Florida;University of Florida;University of Florida;University of Florida;University of Florida

  • Venue:
  • Journal of Cognitive Neuroscience
  • Year:
  • 2001

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Abstract

Goldberg (1985) hypothesized that as language output changes from internally to externally guided production, activity shifts from supplementary motor area (SMA) to lateral premotor areas, including Broca's area. To test this hypothesis, 15 right-handed native English speakers performed three word generation tasks varying in the amount of internal guidance and a repetition task during functional magnetic resonance imaging (fMRI). Volumes of significant activity for each task versus a resting state were derived using voxel-by-voxel repeated-measures t tests (p