Albert Einstein, the genius behind the theory of relativity, is a name synonymous with extraordinary intellect.
After his death, a fascinating and somewhat controversial journey began for one of his most crucial organs, his brain.
This article delves into the reasons behind its preservation, the methods used, and the lingering mysteries that continue to intrigue both the scientific community and the general public.
Table of Contents
Why Was Albert Einstein’s Brain Preserved?
The preservation of Albert Einstein’s brain stemmed from a desire to understand the source of his exceptional intelligence.
As one of the most influential scientists of the 20th century, Einstein’s cognitive abilities were of immense interest to neuroscientists and psychologists.
They hoped that by studying his brain, they could uncover physical traits or anomalies that might explain his intellectual prowess.
How Was Albert Einstein’s Brain Preserved?
Death and Autopsy: Albert Einstein passed away on April 18, 1955, in Princeton, New Jersey, due to an abdominal aortic aneurysm. During the autopsy, Dr. Thomas Stoltz Harvey, the pathologist at Princeton Hospital, removed Einstein’s brain for examination.
Sectioning and Preservation: Dr. Harvey meticulously sectioned Einstein’s brain into 240 pieces. These sections were then preserved in a solution called formalin, a type of formaldehyde used to prevent biological tissues from decaying.
Distribution to Researchers: Over the years, Dr. Harvey distributed these brain sections to various researchers across the globe. This allowed multiple scientific teams to study Einstein’s brain in hopes of discovering the secrets behind his intellectual abilities.
The Mysteries and Controversies
The story of Albert Einstein’s brain is shrouded in several mysteries and controversies:
Consent and Ethical Issues: One of the primary controversies revolves around consent. It remains unclear whether Einstein or his family gave explicit permission for his brain to be preserved and studied. Some reports suggest that neither Einstein nor his family were informed about the removal and preservation of his brain, raising ethical concerns about the practice.
Scientific Findings: Despite numerous studies, conclusive evidence explaining Einstein’s genius remains elusive. Some researchers noted unique features, such as a higher number of glial cells (which support and protect neurons) in certain parts of his brain. Others pointed out differences in the structure of his parietal lobe, which is associated with mathematical reasoning and spatial awareness. However, these findings are still debated, and no single factor has been identified as the definitive source of Einstein’s intelligence.
Handling and Distribution: Dr. Harvey’s possession and distribution of Einstein’s brain pieces have also been a source of controversy. His decision to keep the brain and later share it with researchers worldwide led to questions about the ethical treatment of Einstein’s remains and the scientific validity of such studies. The fragmented distribution also made it challenging to conduct comprehensive and cohesive research.
Notable Studies and Findings
Several significant studies have been conducted on Albert Einstein’s brain over the decades:
Glial Cells Study (1985): In a study published in 1985, Dr. Marian Diamond from the University of California, Berkeley, found that Einstein’s brain had a higher ratio of glial cells to neurons in certain areas compared to an average brain. This suggested that glial cells might play a role in cognitive functions, although the exact implications remain unclear.
Parietal Lobe Study (1999): Another study led by Dr. Sandra Witelson in 1999 revealed that Einstein’s parietal lobes were 15% wider than those of average people. The parietal lobes are associated with spatial and mathematical abilities, potentially offering some insight into Einstein’s exceptional skills in these areas.
Corpus Callosum Study (2013): In 2013, a study led by Weiwei Men from East China Normal University used high-resolution photographs to analyze Einstein’s corpus callosum, the bundle of nerve fibers connecting the brain’s two hemispheres. The study found that Einstein had a thicker corpus callosum than average, which might have facilitated better communication between his brain hemispheres, enhancing his cognitive abilities.
The preservation of Albert Einstein’s brain remains one of the most intriguing stories in the history of neuroscience.
While the quest to uncover the secrets of his intellect continues, the journey has been fraught with ethical dilemmas and scientific debates.
The mysteries surrounding his brain highlight the complexity of intelligence and the ongoing challenge of deciphering the workings of the human mind.
FAQs About Albert Einstein’s Brain
1. Why was Albert Einstein’s brain preserved?
Albert Einstein’s brain was preserved to study the physical basis of his extraordinary intelligence. Scientists hoped that examining his brain would reveal insights into the neurological underpinnings of genius.
2. Who removed and preserved Albert Einstein’s brain?
Dr. Thomas Stoltz Harvey, the pathologist who performed Einstein’s autopsy at Princeton Hospital on April 18, 1955, removed and preserved the brain without explicit permission from Einstein or his family.
3. How was Albert Einstein’s brain preserved?
Dr. Harvey sectioned Einstein’s brain into 240 pieces and preserved them in formalin, a solution of formaldehyde, to prevent decay. These pieces were later distributed to various researchers for study.
4. What was the weight of Albert Einstein’s brain?
Albert Einstein’s brain weighed approximately 1,230 grams (about 2.71 pounds), which is slightly below the average human brain weight of 1,300 to 1,400 grams.
5. Were there any unique features in Albert Einstein’s brain?
Yes, several unique features were noted:
Larger parietal lobes, which are associated with spatial reasoning and mathematics.
A partially absent Sylvian fissure, potentially allowing for better connectivity between different brain regions.
A higher ratio of glial cells to neurons, which are essential for supporting brain functions.
6. Did Albert Einstein or his family consent to the preservation of his brain?
It remains unclear whether Einstein or his family gave explicit consent for the removal and preservation of his brain. This has raised ethical questions about the handling of his remains.
7. What have studies of Einstein’s brain revealed?
Studies have reported various findings, such as unusual features in the parietal lobes and a higher number of glial cells. However, these findings are not universally accepted, and there is no definitive conclusion about what made Einstein’s brain unique.
8. Where are the pieces of Albert Einstein’s brain now?
Pieces of Einstein’s brain are housed in several locations, including the National Museum of Health and Medicine in Washington, D.C., and the Mütter Museum in Philadelphia. Some pieces were also distributed to researchers worldwide.
9. Why is the story of Albert Einstein’s brain significant?
The story of Albert Einstein’s brain is significant because it highlights the scientific quest to understand intelligence, the ethical dilemmas in scientific research, and the enduring fascination with one of history’s greatest minds.
10. Has the study of Einstein’s brain changed our understanding of intelligence?
While studies of Einstein’s brain have provided interesting insights, they have not fundamentally changed our understanding of intelligence. Modern neuroscience recognizes that intelligence is influenced by a complex interplay of genetic, structural, and environmental factors, rather than being determined by specific brain features alone.
Top: Dorsal photograph of Einstein’s brain with original labels. Bottom: Our identifications. a2 = angular; a3 = anterior occipital; c = central; e = processus acuminis; fm = midfrontal; fs = superior frontal; inp = intermediate posterior parietal; ip = intraparietal; m = marginal; mf = medial frontal; ocs = superior occipital; otr = transverse occipital; par = paroccipital; pci = precentral inferior; pcs = precentral superior; pma = marginal precentral; pme = medial precentral; po = parieto-occipital; prc = paracentral; ps = superior parietal; pst = transverse parietal; pti = postcentral inferior; pts = postcentral superior; rc = retrocalcarine; u = unnamed. k = presumed motor cortex for right hand; K = ‘knob’ representing motor cortex for left hand. In both hemispheres, e limits anteriorly the first annectant gyrus, a pli de passage of Gratiolet that connects the parietal and occipital lobes, indicated by red arrows (see also Fig. 7). This figure is reproduced with permission from the National Museum of Health and Medicine.Top: Photographs of the left (L) and right (R) lateral surfaces of Einstein’s brain taken with the front of the brain rotated toward the viewer, with original labels. Bottom: Our identifications. Numbers 1–4 indicate four gyri in Einstein’s right frontal lobe, rather than three as is typical; K = ‘knob’ representing motor cortex for left hand. Submerged gyri are shaded red near the diagonal sulcus on each side. It is clear from the left hemisphere that the posterior ascending limb of the Sylvian fissure and the postcentral inferior sulcus are not confluent, contrary to the literature. Sulci: a = additional inferior frontal; a1 = ascending branch of the superior temporal sulcus; a2 = angular; aS = posterior ascending limb of the Sylvian; c = central; d = diagonal; dt = descending terminal branch of the Sylvian; fi = inferior frontal; fm = midfrontal; fs = superior frontal; ht = posterior terminal horizontal branch of the Sylvian; ip = intraparietal; mf = medial frontal; pci = precentral inferior; pcs = precentral superior; pma = marginal precentral; pti = postcentral inferior; pts = postcentral superior; R = ascending ramus of anterior Sylvian fissure; R’ = horizontal ramus of anterior Sylvian fissure; S = Sylvian fissure; sa = sulcus acousticus; sca = subcentral anterior; scp = subcentral posterior; sip = intermedius primus of Jensen; ti = inferior temporal; tri = triangular; ts = superior temporal; tt = transverse temporal; u = unnamed; W = fronto-marginal of Wernicke. 1 = superior frontal gyrus; 2 = atypical superior middle frontal gyrus; 3 = atypical inferior middle frontal gyrus; 4 = inferior frontal gyrus (usually the ‘inferior third frontal gyrus’). The figure reproduced with permission from the National Museum of Health and Medicine.Top: Photographs of the left (L) and right (R) lateral surfaces of Einstein’s brain taken from a traditional view, which lack original labels. Bottom: Our identifications. Numbers 1–4 on the right hemisphere indicate four gyri in Einstein’s right frontal lobe, rather than three as is typical. Sulci: a = additional inferior frontal; a1 = ascending branch of the superior temporal sulcus; a2 = angular; a3 = anterior occipital; aS = posterior ascending limb of the Sylvian; c = central; d = diagonal; dt = descending terminal branch of the Sylvian; e = processus acuminis; fi = inferior frontal; fm = midfrontal; fs = superior frontal; ht = posterior terminal horizontal branch of the Sylvian; inp = intermediate posterior parietal; ip = intraparietal; mf = medial frontal; ocl = lateral occipital; ocs = superior occipital; otr = transverse occipital; par = paroccipital; pci = precentral inferior; pcs = precentral superior; ps = superior parietal; pti = postcentral inferior; pts = postcentral superior; R = ascending ramus of anterior Sylvian fissure; R’ = horizontal ramus of anterior Sylvian fissure; S = Sylvian fissure; sa = sulcus acousticus; sca = subcentral anterior; scp = subcentral posterior; sip = intermedius primus of Jensen; ti = inferior temporal; tri = triangular; ts = superior temporal; tt = transverse temporal; u = unnamed. 1 = superior frontal gyrus; 2 = atypical superior middle frontal gyrus; 3 = atypical inferior middle frontal gyrus; 4 = inferior frontal gyrus (usually the ‘inferior third frontal gyrus’). K = ‘knob’ representing motor cortex for left hand. The figure is reproduced with permission from the National Museum of Health and Medicine.Top: Photographs of the left (L) and right (R) lateral surfaces of Einstein’s brain taken with the back of the brain rotated towards the viewer, with original labels. Bottom: Our identifications. The arrows indicate the pre-occipital notch at the inferolateral border of each hemisphere, which indicate the approximate inferior boundary between the lateral surfaces of the temporal and occipital lobes; on the right, an apparent artificial cut severed the rostral tip (shaded red) of a gyrus in the posterior part of the inferior temporal lobe. This cut appears to be a lateral extension of that observed on the right side of the base of the brain (Fig. 6). Typically, the supramarginal gyrus surrounds the posterior ascending limb of the Sylvian, and the angular gyrus surrounds the upturned end(s) of superior temporal sulcus. These gyri are separated approximately at the level of the intermedius primus sulcus of Jensen and together form the inferior parietal lobule. The supramarginal gyri are shaded blue; the angular gyri are aqua. In the left hemisphere, part of the cortical region above posterior terminal horizontal branch of the Sylvian is shaded an inbetween colour because it could arguably belong to either gyrus. Einstein’s inferior parietal lobules have different shapes in the two hemispheres, and appear to be relatively larger on the left side. Sulci: a1 = ascending branch of the superior temporal sulcus; a2 = angular; a3 = anterior occipital; aS = posterior ascending limb of the Sylvian; c = central; dt = descending terminal branch of the Sylvian; e = processus acuminis; ht = posterior terminal horizontal branch of the Sylvian; i = inferior polar; inp = intermediate posterior parietal; ip = intraparietal; lc = lateral calcarine; oci = inferior occipital; ocl = lateral occipital; ocs = superior occipital; otr = transverse occipital; par = paroccipital; ps = superior parietal; pti = postcentral inferior; pts = postcentral superior; rc = retrocalcarine; S = Sylvian fissure; scp = subcentral posterior; sip = intermedius primus of Jensen; ti = inferior temporal; ts = superior temporal; u = unnamed. The figure is reproduced with permission from the National Museum of Health and Medicine.Top: Photograph of a frontal view of Einstein’s brain in an unconventional orientation, with original labels. Bottom: Our identifications of sulci. a = additional inferior frontal; fi = inferior frontal; fm = midfrontal; fs = superior frontal; mf = medial frontal; S = Sylvian fissure; ts = superior temporal; W = fronto-marginal of Wernicke. The figure is reproduced with permission from the National Museum of Health and Medicine.Top: Separate photographs of the right (R) and left (L) basal views of Einstein’s bisected brain with cerebellum removed and original labels. Bottom: Our identifications. The two photographs are not to the same scale and the right hemisphere is rotated slightly laterally compared with the left, as suggested by a published basal photograph of the entire brain with its cerebellum attached (Witelson et al., 1999b). The base of Einstein’s brain appears to have been accidentally cut, perhaps with a scalpel, as indicated in red shading. This may have occurred during removal of the dura mater (tentorium cerebelli) that separates the dorsum of the cerebellum from the inferior surface of the occipital lobes. Magnifying the photographs on a computer screen should facilitate observation of these cuts. See Fig. 4 for an extension of this cut that reached the right lateral surface of the temporal lobe where it severed the tip of a gyrus (shaded in red). Sulci: arc = arcuate orbital; col = collateral; fi = inferior frontal; i = inferior polar; mo = medial orbital; oa = anterior orbital; oal = lateral anterior orbital; oci = inferior occipital; oct = occipito-temporal; op = posterior orbital; opl = lateral posterior orbital; os = olfactory; R’ = horizontal ramus of anterior Sylvian fissure; rh = rhinal; ti = inferior temporal. Abbreviations of other features: los = lateral olfactory stria; mb = mammillary body; mos = medial olfactory stria; ob = olfactory bulb; on = optic nerve; ot = olfactory tract. The figure is reproduced with permission from the National Museum of Health and Medicine.Top: Photograph of an occipital view of Einstein’s brain in an unconventional orientation, with original labels. Bottom: Our identifications. In both hemispheres, a processus acuminis limits anteriorly the first annectant gyrus, a pli de passage of Gratiolet that connects the parietal and occipital lobes, indicated by red arrows (see also Fig. 1). See Fig. 10B for shading of the superior and inferior parietal lobules and the occipital lobe on this image. Sulci: a2 = angular; a3 = anterior occipital; c = central; cu = cuneus; e = processus acuminis; inp = intermediate posterior parietal; ip = intraparietal; lc = lateral calcarine; m = marginal; oci = inferior occipital; ocl = lateral occipital; ocs = superior occipital; otr = transverse occipital; par = paroccipital; pcs = precentral superior; po = parieto-occipital; ps = superior parietal; pst = transverse parietal; pti = postcentral inferior; pts = postcentral superior; rc = retrocalcarine; sp = subparietal; ss = superior sagittal; ti = inferior temporal; ts = superior temporal. The figure is reproduced with permission from the National Museum of Health and Medicine.Top: Photographs of the left (L) and right (R) medial surfaces of Einstein’s brain with original labels. Bottom: Our identifications. Arrows indicate sulci that extend onto the dorsolateral surface of the brain. Sulci: ac = anterior calcarine; apo = anterior parolfactory; c = central; ca = callosal; cal = calcarine; ci = cingulate; cu = cuneus; li = lingual; lp = limiting sulcus of precuneus; m = marginal; mf = medial frontal; otr = transverse occipital; pc = paracalcarine; pma = marginal precentral; pme = medial precentral; po = parieto-occipital; prc = paracentral; pst = transverse parietal; rc = retrocalcarine; ri = inferior rostral; rs = superior rostral; si = inferior sagittal; sp = subparietal; ss = superior sagittal; u = unnamed. Other abbreviations: cc = corpus callosum; f = fornix; hpt = hypothalamus; ipo = parieto-occipital incisure; sep = septum pellucidum; th = thalamus. See text for discussion. The figure is reproduced with permission from the National Museum of Health and Medicine.Top: Photograph of Einstein’s right insula after removal of the opercula, with original labels. Bottom: Our identifications of sulci: aps = anterior periinsular; cis = central insular; pcis = precentral insular; pis = postcentral insular; sis = short insular; sps = superior periinsular; Other identification: ia = apex of insula. The figure is reproduced with permission from the National Museum of Health and Medicine.
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