Submission + - LLM-inspired study sheds light on how brain cells encode the meaning of words (medicalxpress.com)
alternative_right writes: To investigate how the brain encodes the meaning of words, the researchers first recorded the activity of individual neurons in the hippocampus of 10 people who were listening to stories. Their recordings were collected using tiny wire electrodes that were implanted in the participants' brains as part of clinical monitoring procedures for epilepsy.
The team then used mathematical models to analyze the language used in the stories and the brain recordings. This allowed them to examine whether information about the meaning of words could predict the recorded neuronal activity.
"We recorded responses of hippocampal neurons while individuals listened to narrative speech," wrote Melissa Franch and her colleagues in their paper. "Using an encoding model approach, we find robust encoding of semantics, even after controlling for phonemics and grammar. Individual words had complex selectivities that included multiple words in multiple semantic categories."
The team then used mathematical models to analyze the language used in the stories and the brain recordings. This allowed them to examine whether information about the meaning of words could predict the recorded neuronal activity.
"We recorded responses of hippocampal neurons while individuals listened to narrative speech," wrote Melissa Franch and her colleagues in their paper. "Using an encoding model approach, we find robust encoding of semantics, even after controlling for phonemics and grammar. Individual words had complex selectivities that included multiple words in multiple semantic categories."
