Sleep architecture refers to the structure and pattern of sleep stages that occur throughout the night. It includes different phases such as slow-wave sleep, deep sleep, and rapid eye movement (REM) sleep. Each of these stages plays a crucial role in achieving restorative sleep. For instance, during slow-wave and deep sleep, our brain undergoes a "cleaning" process, removing misfolded proteins and other debris. REM sleep, on the other hand, is associated with dreaming and memory consolidation. It's important to note that the presence of substances like alcohol can disrupt this architecture, leading to less restorative sleep, often referred to as pseudosleep in the sleep science field.