Wikepedia Encyclopedia has the followig statement:

"Before the cremation, Princeton Hospital pathologist Thomas Stoltz Harvey removed Einstein's brain for preservation, in hope that the neuroscience of the future would be able to discover what made Einstein so intelligent"
availab should read "available"

From Wikipedia:
Scientific studies

********** Study finding part of Einstein's brain missing and another part 15% larger *******

However, in 1999, further analysis by a team at McMaster University in Ontario revealed that his parietal operculum region in the inferior frontal gyrus in the frontal lobe of the brain was vacant. Also absent was part of a bordering region called the lateral sulcus (Sylvian fissure). Researchers at McMaster University speculated that the vacancy may have enabled neurons in this part of his brain to communicate better. "This unusual brain anatomy…(missing part of the Sylvian fissure)… may explain why Einstein thought the way he did," said Professor Sandra Witelson who led the research published in The Lancet. It should be noted that this study was based on photographs of Einstein's brain made in 1955 by Dr. Harvey, and not direct examination of the brain, as implied by the caption of one of the photographs, inaccurately identifying it as a photograph from 1995. Einstein himself claimed that he thought through images rather than verbally. Professor Laurie Hall of Cambridge University commenting on the study, said, "To say there is a definite link is one bridge too far, at the moment. So far the case isn't proven. But magnetic resonance and other new technologies are allowing us to start to probe those very questions." [7]

Scientists are currently interested in the possibility that physical differences in brain structure could determine different abilities. [8] [9]One famous part of the operculum is Broca's area which plays an important role in speech production (Einstein was speculated to have Asperger's Syndrome). To compensate, the inferior parietal lobe was 15 percent wider than normal. [10] The inferior parietal region is responsible for mathematical thought, visuospatial cognition, and imagery of movement.

*******Study finding more glial cells in Einstein's brain********

In the 1980s, University of California, Berkeley professor Marion C. Diamond persuaded Thomas Harvey to give her samples of Einstein's brain. She compared the ratio of glial cells in Einstein's brain with that in the preserved brains of 11 men. (Glial cells provide support and nutrition in the brain, form myelin, and participate in signal transmission.) Dr. Diamond's laboratory made thin sections of Einstein's brain, each 6 micrometers thick. They then used a microscope to count the cells. Einstein's brain had more glial cells relative to neurons in all areas studied, but only in the left inferior parietal area was the difference statistically significant. This area is part of the association cortex, regions of the brain responsible for incorporating and synthesizing information from multiple other brain regions. Diamond admits a limitation in her study is that she had only one Einstein to compare with 11 normal men. S. S. Kantha of the Osaka BioScience Institute in Japan criticized Diamond's study, as did Terence Hines of Pace University. [11]

Diamond and Joseph Altman (then of Purdue University) had already both discovered that rats with enriched environments developed more glial cells for each neuron. Rats in impoverished environments had fewer glial cells relative for each neuron. [12]

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