Brain organoids grown in a laboratory have gained signal processing capabilities
Researchers at the University of Tokyo have found that three interconnected brain organoids have learned to distinguish between electrical stimuli. This study offers significant findings regarding the fundamental information processing mechanisms of neural tissue.
A team led by neuroscientist Yoshiho Ikeuchi from the University of Tokyo created a neural network by connecting three brain organoids derived from human induced pluripotent stem cells. Following two weeks of regular electrical stimulation, it was observed that this structure learned to distinguish the source of the signals and developed more stable responses over time.
Technical infrastructure of the experiment
Researchers established a unified neural network structure by connecting three separate laboratory-grown brain organoids via microelectrodes. This system was created using human induced pluripotent stem cells.
Observation of the learning process
Regular electrical stimuli applied to the network over two weeks were used to analyze the organoids' responses. The examinations revealed that the organoids showed improvement over time in distinguishing the points of origin for the stimuli.
Data obtained during the signal processing phase proved that the organoids' responses exhibited increasingly stable and distinct patterns over time.
Scope of scientific findings
The study, published in the journal Communications Biology, does not imply that the organoids have gained consciousness. However, the research provides critical data on how neural tissue can organize fundamental information processing and learning-like processes.