Attentional Control and Intelligence: MRI Orbital Frontal Gray Matter and Neuropsychological Correlates
Table 4
Pearson correlations of orbital frontal cortex volumes and neuropsychological measures.
Measures
Left
Right
GR
MiOG
LOG
OFC_L
GR
MiOG
LOG
OFC_R
WAIS-III IQ
Full scale
0.057
0.481*
0.006
0.435*
0.251
0.610**
0.11
0.615**
Verbal
0.036
0.511*
0.042
0.461*
0.307
0.549**
0.113
0.585**
Performance
0.054
0.420*
−0.018
0.377
0.157
0.62**
0.113
0.591**
WAIS-III index
Verbal comprehension
0.099
0.622**
0.073
0.586**
0.396
0.561**
0.148
0.632**
Perceptual organization
0.075
0.345
−0.082
0.307
0.218
0.605**
0.081
0.594**
Working memory
0.094
0.166
0.090
0.196
0.203
0.348
0.076
0.375
Processing speed
0.145
0.296
0.116
0.332
0.212
0.372
0.141
0.409
Trail Making Test (in seconds)
Trails A
0.268
−0.370
0.509*
−0.146
0.111
−0.307
0.139
−0.209
Trails B
−0.083
−0.608**
−0.072
−0.577**
−0.169
−0.481*
−0.222
−0.521*
Wisconsin Card Sort
Categories completed
−0.066
0.181
−0.145
0.111
−0.128
0.164
0.184
0.124
Perseverative errors
−0.25
−0.399
0.193
−0.406
−0.162
−0.450*
−0.046
−0.466*
Nonperseverative errors
0.036
−0.23
0.162
−0.163
0.084
−0.134
−0.176
−0.112
**Correlation is significant at the 0.01 level (2-tailed). *Correlation is significant at the 0.05 level (2-tailed). Note. GR = gyrus rectus, MiOG = m middle orbital gyrus, LOG = lateral orbital gyrus, and OFC = orbitofrontal cortex.
