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

Areas	American Sign Language condition
	Hearing			Deaf			Hearing native signers
	Left	Right	Hemi	Left	Right	Hemi	Left	Right	Hemi
Frontal
Middle frontal gyrus	NS	NS	NS	.013	NS	NS	NS	NS	NS
Frontal pole	NS	NS	NS	NS	.016	NS	NS	.013	NS
Frontal orbital cortex	NS	NS	NS	.025	NS	NS	.028	.025	NS
Dorsolateral prefrontal cortex	NS	NS	NS	.001	.001	NS	.001	NS	NS
Broca’s*	NS	NS	NS	.004	.0004	NS	.0008	.038	.001
Precentral sulcus, inf.	NS	NS	NS	.005	.004	NS	.0000	.017	.007
Precentral sulcus, post.	NS	NS	NS	.001	.016	NS	.0003	.003	NS
Precentral sulcus, sup.	NS	NS	NS	.0001	.007	.030	.002	.014	.005
Central sulcus	NS	NS	NS	.033	.031	NS	.010	NS	NS
Temporal
Temporal pole	NS	NS	NS	.002	.0001	NS	.020	.011	NS
Superior temp. sulcus, ant.	NS	NS	NS	.004	.0002	NS	.002	.0001	NS
Superior temp. sulcus, mid.	NS	NS	NS	.010	.0000	NS	.0004	.0000	NS
Superior temp. sulcus, post.	NS	NS	NS	.002	.0000	NS	.0003	.0002	NS
Sylvian fissure, ant.	NS	NS	NS	.005	.033	NS	.004	NS	NS
Sylvian fissure, mid.	NS	NS	NS	.017	NS	NS	.044	NS	NS
Temporoparietal
Supramarginal gyrus	NS	NS	NS	NS	NS	NS	.001	.044	.006
Angular gyrus	NS	NS	NS	.020	.0002	NS	.0006	.0002	NS
Anterior occipital sulcus	NS	NS	NS	NS	.003	NS	.006	.003	NS
Intraparietal sulcus	NS	NS	NS	NS	NS	NS	.013	NS	NS
Postcentral sulcus	NS	NS	NS	NS	.037	NS	NS	NS	NS

The cortical areas were defined relative to sulcal anatomy. NS, not significant (P > .05). 

^*Pars frontalis, opercularis, triangularis.