Table 5.

Insomnia Patients Show Less Activation than Controls: Letter Fluency Related Brain Activation

anatomical region	Z value	x	y	z
left polar frontal cortex (BA 9,10)	4.20	−6	62	22
left superior frontal gyrus (BA 9)	3.44	−4	56	34
left inferior frontal gyrus (BA 45, 10)	4.17	−36	52	−12
left superior frontal gyrus (BA 9)	3.49	−14	46	36
left superior frontal gyrus (BA 9)	3.73	−6	44	38
left middle frontal gyrus	3.15	−40	24	44

Brain regions are listed from anterior to posterior. X, y, and z coordinates (in MNI space) refer to the voxel with the highest level of activation within the activated cluster of voxels, with corresponding Z-value.