The Posterior Cingulate Cortex (PCC) is a region located in the brain's medial aspect, part of the cingulate cortex. It plays a crucial role in various cognitive functions, including memory retrieval, emotional regulation, and self-referential thought. The PCC is also involved in the default mode network, which is active when a person is at rest and not focused on the external environment. Research indicates that the PCC is important for integrating sensory information and supporting decision-making processes. It has been linked to Alzheimer's disease and other neurodegenerative conditions, where its function may be disrupted, leading to cognitive decline and memory issues.