Bilinguals may speak only one of their native languages after undergoing medical anesthesia. This can occur even in those who learned their second or subsequent languages in adulthood, even if they have reached a high level of proficiency.
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This was reported by Olga Suchkova, an assistant professor in the psychology department at Tver State University, in an interview with the Russian news agency TASS.
The media had previously highlighted the case of a 28-year-old English teacher from the Russian city of Vladimir, who woke up after being anesthetized and began speaking only English, and did not regain the ability to speak Russian until several hours later.
The expert from Tver State University explained that this interaction is due to individual biological and psychological differences, and that the high level of proficiency in the foreign language, which was firmly established through the teacher's professional activity, played the main role in it.
Suchkova said: "It can be assumed that this is also possible for bilinguals who have two mother tongues from early childhood, and speak and think in them to almost the same degree, although one of them remains the dominant language. There is also a possibility that this could happen with sequential bilinguals, that is, those who learned the second and subsequent languages in adulthood and mastered them to a high level."
According to her, the anesthesia may have affected the language centers in the teacher's brain, specifically Broca's and Wernicke's areas, temporarily disabling the region responsible for speaking the native language. Once the patient awoke from the anesthesia and regained full consciousness, his speech functions were restored.
The scientist pointed out that it is unlikely that a person, after undergoing anesthesia, would start speaking a language they had never learned, because that requires neural connections that were formed during the learning process.
She said: "If it had been someone from another profession, whose level of foreign language did not exceed the school level, this would not have happened either."
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