Anaesthetics do more than numb pain, they also blunt memories. In 2014, a small study showed that after coming round from a general anaesthetic, people found it difficult to remember the emotional content of memories they recalled just before they went under. But the people in this study were undergoing electroconvulsive therapy to their brain, so it wasn’t clear whether it was the anaesthetic or the therapy causing the change in memory.
To find out, Bryan Strange at the Technical University of Madrid, Spain, and colleagues recruited 40 people having an endoscopy under a common general anaesthetic called propofol.
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