Table 2. Connectivity to anatomical areas from all olfactory cortex templates.
| Anatomical area | AAL area | fOCN | fOCN (grey) | sOCN | mOCN |
|---|---|---|---|---|---|
| Primary olfactory cortical areas | |||||
| Piriform cortex (left) | 21 | 100% | 100% | * | * |
| Piriform cortex (right) | 22 | 100% | 100% | * | * |
| Amygdala (left) | 41 | 100%** | 100%** | 100% | 100%** |
| Amygdala (right) | 42 | 100%** | 100%** | 100% | 100%** |
| Areas with secondary olfactory processing | |||||
| Orbitofrontal cortex (left, superior) | 5 | 69% | 69% | 100% | 100% |
| Orbitofrontal cortex (right, superior) | 6 | 100% | 100% | 100% | 100% |
| Orbitofrontal cortex (left, inferior) | 15 | 69% | 69% | 100% | 100% |
| Orbitofrontal cortex (right, inferior) | 16 | 69% | 69% | 100% | 100% |
| Orbitofrontal cortex (left, medial) | 25 | 56% | — | 100% | 100% |
| Orbitofrontal cortex (right, medial) | 26 | — | — | 100% | 100% |
| Gyrus rectus (left) | 27 | 75% | 69% | 100% | 100% |
| Gyrus rectus (left) | 28 | 94% | 94% | 100% | 100% |
| Insula (left) | 29 | 100% | 88% | 100% | 100% |
| Insula (right) | 30 | 100% | 100% | 100% | 100% |
| Anterior cingulate cortex (left) | 31 | — | — | 100% | 100% |
| Anterior cingulate cortex (right) | 32 | — | — | 100% | 100% |
| Hippocampus (left) | 37 | 100% | 100% | — | 100% |
| Hippocampus (right) | 38 | 100% | 100% | — | 100% |
| Parahippocampal gyrus (left) | 39 | 100% | 100% | 100% | 100% |
| Parahippocampal gyrus (right) | 40 | 100% | 100% | 100% | 100% |
| Caudate nucleus (left) | 71 | 100% | 100% | 100% | 100% |
| Caudate nucleus (right) | 72 | 100% | 100% | 100% | 100% |
| Putamen (left) | 73 | 100%** | 100%** | 100% | 100% |
| Putamen (right) | 74 | 100%** | 100%** | 100% | 100% |
| Temporal pole (left, superior) | 83 | 100% | 100% | 100% | 100% |
| Temporal pole (right, superior) | 84 | 100% | 100% | 100% | 100% |
| Temporal pole (left, middle) | 87 | 81% | 69% | 50% | 56% |
| Temporal pole (right, middle) | 88 | 94% | 94% | 63% | 63% |
| Areas connected before removal of non-grey matter voxels | |||||
| Calcarine fissure (right) | 44 | 50% | — | — | — |
| Lingual gyrus (right) | 48 | 50% | — | — | — |
| Occipital lobe (left, middle) | 51 | 50% | — | — | — |
| Fusiform gyrus (right) | 56 | 56% | — | — | — |
| Pallidum (left) | 73 | 100% | — | — | — |
| Pallidum (right) | 74 | 100% | — | — | — |
| Thalamus (left) | 77 | 94% | — | — | — |
| Thalamus (right) | 78 | 88% | — | — | — |
Connectivity strength listed in percentages of subjects with structural connections between the OC template and the listed area. A threshold of 50% was applied; meaning only connections present in more than half of subjects are included. All connections are from the template to ipsilateral areas. * The sOCN and mOCN include the whole piriform cortex. ** As the fOCN templates contain parts of the amygdala and putamen, the connectivity strength is a representation of connectivity to the remaining parts of these regions.
AAL: Automated anatomical labelling atlas. fOCN: Olfactory cortical template based on functional meta-analysis. fOCN (grey): Functional olfactory cortex network template containing only defined grey matter regions. sOCN: Olfactory cortex network template based on structural data from the AAL template. mOCN: Olfactory cortical network template based on merged structural and functional data.