AP PSYCHOLOGY

Detailed explanation-1: -M’s inability to form new memories after his operation, known as anterograde amnesia, was the result of his loss of hippocampus.

Detailed explanation-2: -H.M. suffered a dense and persistent anterograde amnesia following bilateral medial temporal lobectomy in 1953 to treat intractable epilepsy (Scoville & Milner, 1957). His scientific fame derives from the dramatic demonstration of the critical role that the mesial temporal lobe structures play in learning and memory.

Detailed explanation-3: -Remarkably, H.M. exhibited profound forgetfulness but in the absence of any general intellectual loss or perceptual disorders. He could not form new memories (anterograde amnesia) and also could not access some memories acquired before his surgery (retrograde amnesia).

Detailed explanation-4: -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. His anterograde procedural memory was totally affected.

Detailed explanation-5: -Known as Patient H.M. to the medical community, he lost the ability to create memories after he underwent a lobotomy to treat his seizures.