from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Lying above a margin
from The Century Dictionary and Cyclopedia
- Bordering the Sylvian fissure on the upper side: noting a convolution of the brain. Also superomarginal.
- n. A horny plate or scale, forming part of the covering of the carapace of a turtle, interposed between the marginals and vertebrals. Found in some extinct species.
 Foot of the left or right third frontal convolutions, auditory speech in the supramarginal, etc.
The parietotemporal supplies the supramarginal and angular gyri, and the posterior parts of the superior and middle temporal gyri.
The superior temporal gyrus lies between the posterior ramus of the lateral fissure and the superior temporal sulcus, and is continuous behind with the supramarginal and angular gyri.
One, the supramarginal, arches over the upturned end of the lateral fissure; it is continuous in front with the postcentral gyrus, and behind with the superior temporal gyrus.
Based on the cases I have seen, I would argue that there are anatomical structures unique to the human brain; especially the left angular gyrus and supramarginal gyrus, which split off from the more ancient inferior parietal lobule as it grew during our evolution.
According to the research, "women with normal sexual function had greater activation in superior frontal and supramarginal gyri", as well as the posterior cingulate cortex.
Table 1, the positive correlation patterns overlapped GD-activation in left parietal and temporal regions including supramarginal gyrus (BA 40), precuneus (BA 31), and paracentral lobule (BA 5).
These areas in the dominant hemisphere include Broca’s area, the frontal cortex deep to Broca’s area, the supplementary motor cortex, the arcuate fasciculus connecting Broca’s area to Wernicke’s area, Wernicke’s area and adjacent temporal lobe structures, and the supramarginal gyrus of the parietal lobe 92, 135.