Henry Molaison

1926 - 2008

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Icon of person Henry Molaison

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. His unique case also helped define ethical standards in neurological research, emphasizing the need for patient consent and the consideration of long-term impacts of medical interventions. Read more on Wikipedia

Since 2007, the English Wikipedia page of Henry Molaison has received more than 1,390,809 page views. His biography is available in 25 different languages on Wikipedia (up from 21 in 2019). Henry Molaison is the 1,161st most popular religious figure (down from 1,142nd in 2019), the 1,963rd most popular biography from United States (up from 2,017th in 2019) and the 11th most popular American Religious Figure.

Memorability Metrics

  • 1.4M

    Page Views (PV)

  • 57.98

    Historical Popularity Index (HPI)

  • 25

    Languages Editions (L)

  • 5.59

    Effective Languages (L*)

  • 2.75

    Coefficient of Variation (CV)


Among religious figures, Henry Molaison ranks 1,161 out of 3,187Before him are Cláudio Hummes, Meletius of Antioch, Henry Benedict Stuart, Guru Angad, Saint Mercurius, and Angelus of Jerusalem. After him are Sinchi Roca, Alexandre do Nascimento, Irinej, Serbian Patriarch, Lillian Asplund, Abo of Tiflis, and Dawud al-Zahiri.

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Among people born in 1926, Henry Molaison ranks 115Before him are Rafi Eitan, Leopoldo Calvo-Sotelo, Abdul Rahim Hatif, Robert Fogel, Irene Camber, and Jimmy Savile. After him are Sydney Chaplin, Galina Vishnevskaya, Hans Werner Henze, Yevgeny Leonov, Moritz, Landgrave of Hesse, and Kim Jong-pil. Among people deceased in 2008, Henry Molaison ranks 69Before him are Hugo Claus, Imad Mughniyah, Mauricio Kagel, Leopoldo Calvo-Sotelo, Bo Diddley, and Isaac Hayes. After him are Jean-Marie Balestre, Eartha Kitt, Mate Parlov, Bettie Page, Anthony Minghella, and Don S. Davis.

Others Born in 1926

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In United States

Among people born in United States, Henry Molaison ranks 1,963 out of 20,380Before him are Howard S. Becker (1928), Kevin Mitnick (1963), Fred Phelps (1929), Gigi Hadid (1995), Isaac Hayes (1942), and John Frederick Kensett (1816). After him are Tucker Carlson (1969), Neilia Hunter Biden (1942), Pontiac (1714), Leonard Bloomfield (1887), Clarissa Pinkola Estés (1945), and Lillian Asplund (1906).

Among RELIGIOUS FIGURES In United States

Among religious figures born in United States, Henry Molaison ranks 11Before him are John Mott (1865), William Miller (1782), Rose Kennedy (1890), Joseph Franklin Rutherford (1869), Pat Garrett (1850), and Maria Branyas (1907). After him are Lillian Asplund (1906), Paul Marcinkus (1922), William M. Branham (1909), Marie Laveau (1801), Raymond Leo Burke (1948), and Angelo Dundee (1921).