. Author manuscript; available in PMC: 2014 May 30.

Published in final edited form as: Twin Res Hum Genet. 2007 Oct;10(5):683–694. doi: 10.1375/twin.10.5.683

Table 3.

Genetic and Environmental Correlations for Six ROIs in a Pediatric Twin Sample

	Cerebrum	LV	CC	Thalamus	SC	Cerebellum
Cerebrum	1	.26 (.06 .43)	.37 (.17 .54)	.35 (.16 .51)	.23 (.03 .42)	.58 (.43 .70)
LV	.18 (−.33 .69)	1	−.05 (−.25 .15)	−.22 (−.40 −.03)	-.23 (−.41 −.03)	.29 (.10 .46)
CC	.30 (.05 .52)	.22 (−.54 .74)	1	.49 (32 .63)	.39 (.19 .55)	.10 (−.11 .30)
Thalamus	.97 (.83 1.0)	.00 (−.49 .65)	.42 (.11 .66)	1	.65 (.52 .75)	.07 (−.13 .27)
SC	.82 (.71 .92)	−.37 (−.80 .24)	.35 (.07 .64)	.91 (.81 .98)	1	.13 (−.07 .33)
Cerebellum	.82 (.59 1.0)	.20 (−.59 .71)	.12 (−.38 .57)	.79 (.44 1.0)	.63 (.29 .93)	1

Note: Genetic correlations are provided below the diagonal, with environmental correlations above (From Schmitt et al. 2007).

LV = lateral ventricles

CC = corpus callosum

SC = subcortical nuclei including caudate nucleus, putamen, and globus pallidus

95% confidence intervals are given in parentheses.