Table 2.

Insular volumetric data and asymmetry quotients.

Group	ASD	TD
Age-Group	Pre-teen (N=14)	Ado lescent (N=11)	Pre-teen (N=9)	Adolescent (N=8)
Left Anterior Insula	3.14 (0.46)	3.25 (0.40)	3.04 (0.33)	3.33 (0.44)
Right Anterior Insula	3.01 (0.41)	3.34 (0.52)	3.32 (0.31)	3.32 (0.45)
Left Posterior Insula	2.56 (0.33)	2.64 (0.53)	2.39 (0.26)	2.60 (0.30)
Right Posterior Insula	2.48 (0.46)	2.52 (0.36)	2.41 (0.53)	2.76 (0.48)
Left Total Insula	5.71 (0.76)	5.89 (0.87)	5.43 (0.54)	5.93 (0.66)
Right Total Insula	5.49 (0.75)	5.86 (0.75)	5.74 (0.78)	6.08 (0.89)
Anterior AQ	0.042 (0.129)	−0.023 (0.122)	−0.089 (0.043)	0.006 (0.115)
Posterior AQ	0.041 (0.154)	0.037 (0.124)	0.012 (0.261)	−0.051 (0.141)
Total AQ	0.040 (0.100)	0.003 (0.078)	−0.050 (0.102)	−0.019 (0.098)

Mean and standard deviations of uncorrected anterior, posterior, and total insular volumes (in cm3), as well as asymmetry quotients (AQs) for each insular ROI, arranged by diagnostic group and age group. Positive AQs denote leftward asymmetry and negative AQs denote rightward asymmetry.