The right parietal lobe is the area most commonly associated with neglect. Studies find lesions in IPL and angular gyrus is responsible for orientating 3D space; not because it interprets space, but because it may control attention shifts in space. How can this explanation be challenged?
I think that works by Maurizio Corbetta and colleagues can help you to find the answers to your question. For example https://www.sacklerinstitute.org/cornell/summer_institute/ARCHIVE/2006/papers/Corbetta/Corbetta.Shulman.2002.NRN.pdf
or http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2872555/
Good luck!
There is a vast body of literature as to the structures implied in hemineglect. So it might serve to check for the lesion literature as well as for fMRI for the difference of supramodal neglect, and the difference of the different elements of personal and peripersonal space. Try to incorporate asomatognosia.
In clinical experience, the few patients one encounters with lesions without hemiparesis, have some troubles connecting with reality including their own as well as connecting with others. I never attempted to systemize it. So it may be worth going rather for the different elements of space around them and maybe for "outer world reality connection".
Hans Otto Karnath from Tübingen, germany, might be a source, as he has built his whole career on hemineglect.
It may also help to distinguish the exact location of lesions. For instance, the anterior insula and IFG mediates different aspects of attention performance in cognitive control:
http://www.ncbi.nlm.nih.gov/pubmed/25778346
http://www.ncbi.nlm.nih.gov/pubmed/25355218
It helps to study patients with lesions involving specifically the anterior insula but not adjacent frontal structures.
Hope this helps,
Ray
Yale Psychiatry and Neuroscience
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