Mice with grafted human brain cells are more capable of learning and retaining memory than ordinary mice, according to new research. Scientists used glia, a type of brain cell incapable of sending electrical signals, signifying that the human brain's ability to process information may go beyond just the neurons responsible for sending signals. "It is certainly possible that via several different mechanisms, differences in the number and/or properties of astrocytes could contribute to the greater intellectual capacity of humans compared to other species. This work is an important first step in exploring this possibility," said Robert Malenka, a professor at Stanford University School of Medicine.

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