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The mystery of Albert Einstein's Brain

Einstein's brain was preserved after his death in 1955, but this fact was not revealed until 1986.
On 17 April 1955, Albert Einstein experienced internal bleeding caused by the ballooning and rupture of the largest abdominal artery, which had previously been reinforced surgically in 1948. He took the draft of a speech he was preparing for a television appearance commemorating the State of Israel's seventh anniversary with him to the hospital, but he did not live long enough to complete it.
Lateral sulcuss shown in red.
Einstein refused surgery, saying: "I want to go when I want. It is tasteless to prolong life artificially. I have done my share, it is time to go. I will do it elegantly." He died in Princeton Hospital early the next morning at the age of 76, having continued to work until near the end.
During the autopsy, the pathologist, Thomas Stoltz Harvey, removed Einstein's brain for preservation without the permission of his family, in the hope that the neuroscience of the future would be able to discover what made Einstein so intelligent.
One of the original pathology photos of the Brain before being sectioned.
The autopsy was conducted at Princeton Hospital, on April 18 at 8:00 am. Einstein's brain weighed 1,230 grams -well within the normal human range- which immediately dispelled the concept that intelligence and brain size were directly related.
Harvey injected 11.4% formalin through the internal carotid arteries and afterwards suspended the intact brain in 10% formalin. Harvey photographed the brain from many angles. He then dissected it into about 240 blocks (each about 1 cm3) and encased the segments in a plastic-like material called collodion.  Those sections were then sliced in microscopic slivers and mounted onto slides and stained. There were 12 sets of slides created with hundreds of slides in each set. Harvey retained two complete sets for his own research and distributed the rest to handpicked leading pathologists of the time.
In 1978, Einstein's brain was "rediscovered" in Dr. Harvey's possession. The brain sections had been preserved in alcohol in two large mason jars within a cider box for over 20 years.
Scientific studies have suggested that regions involved in speech and language are smaller, while regions involved with numerical and spatial processing are larger. Other studies have suggested an increased number of Glial cells in Einstein's brain, which provide support and protection for neurons in the brain and peripheral nervous system.
Operculum (brain).
Harvey had reported that Einstein had no parietal operculum in either hemisphere, but this finding has been disputed. Photographs of the brain show an enlarged Sylvian fissure (Lateral sulcus). In 1999, further analysis by a team at McMaster University, revealed that his parietal  operculum region in the frontal lobe of the brain was vacant. Also absent was part of a bordering region called 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 (Lateral Sulcus)]... may explain why Einstein thought the way he did". This study was based on photographs of the whole brain made at autopsy in 1955 by Harvey, and not direct examination of the brain.
Harvey never gave up on his belief that the brain would reveal something special. Near the end of his life, after carting the brain around the country, he returned to the place from which he had taken it: Princeton Hospital. If Einstein's brain ever truly reveals its secrets, Harvey won't be here to see it; he died in 2007 at the age of 94. In 2010, Harvey's heirs transferred all of his holdings constituting the remains of Einstein's brain to the National Museum of Health and Medicine, including 14 photographs of the whole brain never before revealed to the public. Einstein and the mystery of his brain, however, live on.
EPILOGUE
The studies on Albert Einstein's Brain has not yeild a conlusive result so far. At this point, scientists don't know enough about how the brain works to know if the theories are accurate. For all visible purposes, Einstein's brain seems perfectly normal, with nothing that would immediately indicate any great genius. We may not know anything until there's another equivalent genius brain to study.

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