The posterior cingulate gyrus (PCG) is situated in the parietal lobe of the brain and is involved in cognition. There is no consensus as to its specific function but it is thought to play a role in focus of attention, memory and planning.Leech, R., & Sharp, D. J. (2013). The role of the posterior cingulate cortex in cognition and disease. Brain, 137(1), 12-32.