Table 1.

Summary of PET activation results for the comparison between signing and speaking.

Region	Side	X	Y	Z	T
SIGNING > SPEAKING
Frontal cortex
Pre-central gyrus (BA 6)	R	+27	−17	+59	9.87
Temporal cortex
Mid. temporal gyrus (BA 21)	L	−43	−62	+11	11.99
Parietal cortex
Inferior parietal cortex (BA 40)	R	+56	−29	+38	10.24
Superior parietal lobule (BA 1, 2, 3, 4, 7)	L	−35	−31	+50	22.25
	R	+33	−35	+51	11.03
Occipital cortex
Cuneus (BA 19)	L	−10	−81	+36	5.76
Subcortical regions
Thalamus	L	−9	−19	+2	5.55
Cerebellum
	L	−33	−39	−28	9.67
	R	+18	−45	−19	11.70
SPEAKING > SIGNING
Frontal cortex
Pre-central gyrus (BA 6)	L	−56	−6	+42	−6.16
	R	+58	−2	+40	−8.32
Inferior frontal gyrus (BA 47)	R	+29	+21	−17	−7.51
Middle frontal gyrus (BA 8)	R	+52	+16	+38	−6.16
Middle frontal gyrus (BA 9)	L	−54	+18	+30	−5.12
Inf./Mid. frontal gyrus (BA 46)	L	−52	+36	+8	−4.82
	R	+55	+25	+26	−8.24
Medial frontal gyrus (BA 10)	R	+16	+54	+14	−8.87
Medial frontal gyrus (BA 11)	L	−8	+49	−14	−7.02
Superior frontal gyrus (BA 9)	R	+5	+47	+32	−10.18
Superior frontal gyrus (BA 11)	R	+16	+45	−14	−6.41
Temporal cortex
Superior temporal gyrus	L	−58	−16	+5	−18.89
	R	+63	−10	+7	−18.10
Inferior parietal lobule (BA 40)	R	+47	−60	+48	−5.33
Occipital cortex
Mid. occipital gyrus (BA 18)	R	+32	−93	+15	−10.39
Inf. occipital gyrus (BA 18)	L	−29	−96	−6	−10.57
Lingual gyrus (BA 18)	R	+24	−98	−6	−9.82

Results are from the whole brain analysis [critical t₍₉₁₎ = ±4.80].