Table 4.

Summary of voxel-based cortical thickness results (P_{Family-wise error} < 0.05 after small volume correction)

Voxel-based cortical thickness analysis	Region	Right hemisphere coordinates (mm)			t-score	z-score	Right hemisphere coordinates (mm)			t-score	z-score
		x	y	z			x	y	z
T1-weighted grey matter
Tourette syndrome > controls	SI	−29	−48	64	3.5	3.4	35	−45	61	3.6	3.5
	PMd						18	−15	62	4	3.7
Tourette syndrome < controls	OFC	−12	35	−21	4.1	4
	VLPFC	−44	35	−11	4.6	4.3	46	35	−15	4.4	4.1
	Operculum	−35	−7	18	3.8	3.6	55	−12	19	4.5	4.2
	Hippocampus	−33	−30	−11	3.3	3.2	23	−30	−15	3.5	3.4
	Amygdala	−30	−11	−18	3.1	3	24	−7	−11	3.7	3.6
ADHD+ < ADHD–	Hippocampus	−29	−37	−3	4.9	4.5	24	−36	0	4	3.7
	IPC	−59	−49	28	4.4	4.1
T1-weighted grey matter—regression
YGTSS
Tourette syndrome—negative correlation	OFC	−3	33	−20	3.1	3
	VLPFC	−41	21	−9	3.3	3.1	51	27	−6	3	2.9
PUTS
Tourette syndrome—positive correlation	SI	−48	−13	33	4.7	4
	PFC						19	24	43	4.2	3.7

Coordinates [x, y, z] refer to the Montreal Neurological Institute (MNI) standard stereotactic space.

IPC = inferior parietal cortex; MI = primary motor cortex; OFC = orbitofrontal cortex; PMd = dorsal premotor cortex; SI = primary somatosensory cortex; VLPFC = ventrolateral prefrontal cortex.