Relative to BA 44, BA 45 exhibited greater positive correlations with the pars orbitalis region of the inferior frontal gyrus where area 47/12 is located (see Petrides & Pandya, 1994), with the ventromedial prefrontal cortex and with the angular gyrus. Note that on the surface of the brain, this stronger RSFC appears to be restricted to the dorsal part of the angular gyrus, but this is
simply the result of the fact that much of the correlated activity lies just below the cortex buy Doxorubicin and within the parietal extension of the superior temporal sulcus, which will not show on the surface of the brain, as can be seen in the appropriate coronal section in Fig. 2 (BA 45 > BA 44). BA 44 exhibited greater RSFC (relative to BA 45) with the premotor BA 6, the secondary somatosensory cortex within the upper bank of the Sylvian fissure and the caudal superior temporal gyrus (Fig. 1, Table 1). The above RSFC results were in excellent agreement with the predictions of connectivity from parietal and temporal cortex to the homologous ventrolateral regions in the macaque monkey based on the experimental anatomical study of these connections (Petrides & Pandya, 2009). However, there was also an apparent contradiction. In the study with the macaque monkey, the connections of area 45 with lateral
temporal cortex appeared to be more widespread than those of area 44 and to include a more ventral component of the see more lateral temporal cortex. Comparison of the surface of the brain in Fig. 2 (compare panels BA 45 and BA 44) appears to confirm this greater activity in the lateral temporal cortex for BA 45 than for BA 44. However, this did not reach the accepted level of significance in the direct comparison BA 45 > BA 44. Given our prediction that differential RSFC would be observed, Dynein we repeated the direct comparison between BA 44 and BA 45
RSFC, restricting our analysis to the left temporal lobe (Z > 2.3; cluster significance P < 0.05, corrected for a volume of 22 768 mm3). This restricted comparison did reveal significantly greater RSFC between BA 45 and the middle temporal gyrus, relative to BA 44 (Fig. 2). To examine the differences between BA 6 and BAs 44 and 45, direct contrasts were carried out between these ROIs. Relative to both BAs 44 and 45, BA 6 exhibited stronger RSFC with primary somatic and motor areas around the central sulcus, and the secondary somatosensory areas within the frontal and parietal opercula, and the insula. There were also stronger correlations between BA 6 and the superior parietal lobule and the anterior part of the supramarginal gyrus, relative to both BAs 44 and 45. There were stronger correlations between BA 6 and the supplementary motor region and the motor region in the central cingulate gyrus and sulcus, which probably correspond to the cingulate motor areas discovered in the macaque monkey (He et al., 1995) (Fig. 1, Table 1).