Which kind of memory was most impaired in patient Hm?

Which kind of memory was most impaired in patient Hm?

Which kind of memory was most impaired in patient Hm?

336). Subsequently, the terms declarative and nondeclarative were introduced with the idea that declarative memory refers to the kind of memory that is impaired in H.M. and is dependent on the medial temporal lobe.

What type of memory loss did HM and Jimmie suffer from?

Results: H.M. lost the ability to form new memories. This is called anterograde amnesia. He could do a task, and even comment that it seemed easier than he expected, without realising that he had done it hundreds of times before. However, his early childhood memories remained intact.

What is HM in memory?

Henry Molaison, known by thousands of psychology students as "HM," lost his memory on an operating table in a hospital in Hartford in August 1953. ... The operation was successful in that it significantly reduced Henry's seizures, but it left him with a dense memory loss.

What condition does Clive Wearing have?

herpes encephalitis When British conductor and musician Clive Wearing contracted a brain infection in 1985 he was left with a memory span of only 10 seconds. The infection - herpes encephalitis - left him unable to recognise people he had seen or remember things that had been said just moments earlier.

What happened to HM to cause his loss of memory?

Henry Molaison, known by thousands of psychology students as "HM," lost his memory on an operating table in a hospital in Hartford in August 1953. He was 27 years old and had suffered from epileptic seizures for many years.

How did Henry Molaison suffer from anterograde amnesia?

  • After the surgery, which was partially successful in controlling his seizures, Molaison developed severe anterograde amnesia: although his working memory and procedural memory were intact, he could not commit new events to his explicit memory. According to some scientists, he was impaired in his ability to form new semantic knowledge.

What was the most famous case of amnesia?

  • Something like this happened to the most famous case of amnesia in 20th-century science, a man known only as ‘H.M.’ until his death in 2008. When he was 27, a disastrous brain operation destroyed his ability to form new memories, and he lived for the next 55 years in a rolling thirty-second loop of awareness, a ‘permanent present tense’.

What kind of memory disorder does Molaison have?

  • Molaison's general condition has been described as heavy anterograde amnesia, as well as temporally graded retrograde amnesia. Since HM did not show any memory impairment before the surgery, the removal of the medial temporal lobes can be held responsible for his memory disorder.

Why was Henry Molaison unable to form new memories?

  • HM was unable to form new long-term memories of new events or new semantic knowledge – he basically lived in the present (Corkin, 2002). Since HM did not show any memory impairment before the surgery, the removal of the medial temporal lobes can be held responsible for his memory disorder.

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