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Henry Molaison

1926 - 2008

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Henry Gustav Molaison (February 26, 1926 – December 2, 2008), known widely as H.M., was an American who had a bilateral medial temporal lobectomy to surgically resect the anterior two thirds of his hippocampi, parahippocampal cortices, entorhinal cortices, piriform cortices, and amygdalae in an attempt to cure his epilepsy. Although the surgery was partially successful in controlling his epilepsy, a severe side effect was that he became unable to form new memories. A childhood bicycle accident is often advanced as the likely cause of H.M's epilepsy. H.M. Read more on Wikipedia

Since 2007, the English Wikipedia page of Henry Molaison has received more than 1,238,627 page views. His biography is available in 21 different languages on Wikipedia (up from 20 in 2019). Henry Molaison is the 1,109th most popular religious figure (down from 1,053rd in 2019), the 2,018th most popular biography from United States (down from 1,953rd in 2019) and the 11th most popular American Religious Figure.

Memorability Metrics

  • 1.2M

    Page Views (PV)

  • 57.22

    Historical Popularity Index (HPI)

  • 21

    Languages Editions (L)

  • 5.36

    Effective Languages (L*)

  • 2.52

    Coefficient of Variation (CV)

Page views of Henry Molaisons by language


Among religious figures, Henry Molaison ranks 1,109 out of 2,238Before him are Nicholas Mystikos, Simon of Trent, Abu Darda, Fatimah bint Musa, Pavle, Serbian Patriarch, and Keith O'Brien. After him are Jesse Livermore, Giuseppe Siri, Nicholas of Japan, Pietro Gasparri, Nilus the Younger, and Moses the Black.

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Among people born in 1926, Henry Molaison ranks 112Before him are Hugo Banzer, Leopoldo Calvo-Sotelo, Nuon Chea, Zinaida Portnova, Galina Vishnevskaya, and Efraín Ríos Montt. After him are Yevgeny Leonov, John Derek, Raul Hilberg, Aaron Klug, Per Wahlöö, and Nina Kulagina. Among people deceased in 2008, Henry Molaison ranks 69Before him are Marcial Maciel, Jean-Marie Balestre, Muslim Magomayev, Bo Diddley, Leopoldo Calvo-Sotelo, and Bettie Page. After him are Jerry Reed, Joseph M. Juran, Cyd Charisse, Rajko Mitić, Estelle Getty, and Khertek Anchimaa-Toka.

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In United States

Among people born in United States, Henry Molaison ranks 2,018 out of 18,182Before him are Jamie Foxx (1967), Ben Carson (1951), Lewis Mumford (1895), Julia Ann (1969), Howard Martin Temin (1934), and James Whitmore (1921). After him are Blythe Danner (1943), Elizabeth Bishop (1911), Ruth Gordon (1896), Robert Trujillo (1964), Ashley Judd (1968), and Jesse Livermore (1877).

Among RELIGIOUS FIGURES In United States

Among religious figures born in United States, Henry Molaison ranks 11Before him are Pat Garrett (1850), Rose Kennedy (1890), William Miller (1782), Joseph Franklin Rutherford (1869), Lillian Asplund (1906), and Paul Marcinkus (1922). After him are Jesse Livermore (1877), Marie Laveau (1801), William M. Branham (1909), Raymond Franz (1922), Angelo Dundee (1921), and David Wilkerson (1931).