Table 3

Significance levels for ASL (sentences vs. nonsigns) for the left hemisphere (left), right hemisphere (right), and the hemisphere asymmetry (hemi) for each of the groups studied

AreasAmerican Sign Language condition
Hearing Deaf Hearing native signers
LeftRightHemiLeftRightHemiLeftRightHemi
Frontal
 Middle frontal gyrusNSNSNS.013NSNSNSNSNS
 Frontal poleNSNSNSNS.016NSNS.013NS
 Frontal orbital cortexNSNSNS.025NSNS.028.025NS
 Dorsolateral prefrontal cortexNSNSNS.001.001NS.001NSNS
 Broca’s*NSNSNS.004.0004NS.0008.038.001
 Precentral sulcus, inf.NSNSNS.005.004NS.0000.017.007
 Precentral sulcus, post.NSNSNS.001.016NS.0003.003NS
 Precentral sulcus, sup.NSNSNS.0001.007.030.002.014.005
 Central sulcusNSNSNS.033.031NS.010NSNS
Temporal
 Temporal poleNSNSNS.002.0001NS.020.011NS
 Superior temp. sulcus, ant.NSNSNS.004.0002NS.002.0001NS
 Superior temp. sulcus, mid.NSNSNS.010.0000NS.0004.0000NS
 Superior temp. sulcus, post.NSNSNS.002.0000NS.0003.0002NS
 Sylvian fissure, ant.NSNSNS.005.033NS.004NSNS
 Sylvian fissure, mid.NSNSNS.017NSNS.044NSNS
Temporoparietal
 Supramarginal gyrusNSNSNSNSNSNS.001.044.006
 Angular gyrusNSNSNS.020.0002NS.0006.0002NS
 Anterior occipital sulcusNSNSNSNS.003NS.006.003NS
 Intraparietal sulcusNSNSNSNSNSNS.013NSNS
 Postcentral sulcusNSNSNSNS.037NSNSNSNS
  • The cortical areas were defined relative to sulcal anatomy. NS, not significant (P > .05). 

  • * Pars frontalis, opercularis, triangularis.