The lights are out but someone’s home: sensory processing in anaesthetized human brains

Key Points

• This research aims to explore how the hippocampus in anaesthetized individuals processes sensory information despite unconsciousness.
• Detailed neural recordings were made from the hippocampus of unconscious anaesthetized individuals.
• The study examined neuronal responses to auditory tones, focusing on so-called 'oddballs'.
• Participants undergoing brain surgery were monitored to assess predictive neural activity related to language.
• Neuronal activity in the hippocampus responded to auditory 'oddballs', indicating sensory processing.
• Neurons could predict upcoming words in a heard phrase, suggesting a level of language encoding even in unconsciousness.
• Findings imply that complex brain functions persist during a state of anesthesia.

Abstract