. Author manuscript; available in PMC: 2010 Oct 1.

Published in final edited form as: Brain Lang. 2009 Apr 7;111(1):46–54. doi: 10.1016/j.bandl.2009.03.001

Table 2. Anatomical Size Variables in Dyslexia and ADHD.

Variable	Dyslexia		Dyslexia/ADHD		ADHD		Controls
	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Left Hemisphere
AAR Length	11.33	4.03	13.56	5.02	14.34	3.50	12.25	3.43
AHR Length	13.33	3.93	11.24	4.40	14.37	14.37	11.66	5.40
PTr Length	24.66	7.56	24.80	8.93	28.71	6.67	23.91	8.45
Right Hemisphere
AAR Length^a	12.52	3.49	9.87	3.03	10.58	3.08	12.44	4.20
AHR Length	12.30	3.29	9.03	3.66	9.87	3.55	9.95	5.06
PTr Length^a	24.82	5.38	18.90	5.92	20.45	5.83	22.39	8.47
Asymmetry Ratios
AAR	-.13	0.47	.27	0.49	.20	0.43	.01	0.60
AHR	.08	0.35	.22	0.50	.27	0.52	.08	0.77
PTr	-.03	0.38	.25	0.44	.23	0.44	.05	0.67
Cerebral Hemisphere
Left Volume	1563531.56	174214.41	1559193.30	102864.08	1564348.97	122069.82	1603316.07	93286.67
Right Volume	1542643.57	169871.15	1526861.35	98928.58	1533219.85	122846.71	1582245.06	88924.39

Note. Length measurements are in mm. Cerebral hemisphere volume is in mm³. AAR is short for Anterior Ascending Ramus; AHR is short for Anterior Horizontal Ramus; and PTr is short for Pars Triangularis.

Those with and without ADHD differed at p < .05.