The posteromedial cortex (PMC) includes Brodmann areas 23 (posterior cingulate), 29/30 (retrosplenial cortex), 7m (medial parietal cortex), and 31 1).

Impaired consciousness through a focal lesion under the left posteromedial cortex 2).

1)
Parvizi J, Van Hoesen GW, Buckwalter J, Damasio A. Neural connections of the posteromedial cortex in the macaque. Proc Natl Acad Sci USA 2006;103:1563–1568.
2)
Fujioka H, Urasaki E, Yamashita K. Impaired consciousness through a focal lesion under the left posteromedial cortex. Clin Neurophysiol. 2018 Jun 18;129(8):1658-1659. doi: 10.1016/j.clinph.2018.05.022. [Epub ahead of print] PubMed PMID: 29929168.