HM

• What is the name of the man referred to as HM?

  Henry Molaison
• What was the purpose of HM's brain surgery?

  To relieve his epilepsy
• What part of HM's brain was removed during surgery?

  The hippocampus
• Why is the hippocampus significant?

  It is central to episodic memory function
• In what year was HM's memory assessed?

  1955
• How old did HM believe he was during the assessment?

  27 years old
• What was HM's actual age during the assessment?

  31 years old
• What could HM not form after his surgery?

  New long-term memories
• What could HM not recall from earlier that same day?

  What he had eaten
• How did HM perform on tests of immediate memory span?

  He performed well
• Why is the case of HM significant in psychology?

  • Supports the multi-store model of memory
  • Demonstrates the role of the hippocampus in memory
  • Provides insight into memory disorders
• What does the case of HM illustrate about memory disorders?

  They can affect long-term memory formation