Anestezia generală și misterul conștiinței. Ce se întâmplă în creier atunci când „se stinge” conștiența

General anesthesia is widely used in surgeries, yet its exact mechanism for inducing unconsciousness remains unclear. Recent studies indicate that anesthetics disrupt communication between brain regions, providing insights into consciousness. The introduction of general anesthesia in 1846 transformed surgical practices, allowing for over 350 million operations annually. Different anesthetics, like propofol and xenon, induce a state of unconsciousness, but the specific brain processes involved are still being researched. The thalamus, a key brain region, shows reduced activity early in anesthesia, suggesting its role in consciousness. Some patients experience awareness during surgery, leading to the hypothesis of an intermediate state of consciousness. Research also indicates that anesthesia alters individual brain activity patterns, making them less distinct. This suggests consciousness arises from interactions among multiple neural networks. Studying general anesthesia offers a…