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McLeod, S. (2011). Anterograde Amnesia. Retrieved August 28, 2016, from Simply Psychology, http://www.simplypsychology.org/anterograde-amnesia.html
Squire, L. R. (2009). The legacy of patient H.M. For Neuroscience. Neuron, 61(1), 1–6. doi:10.1016/j.neuron.2008.12.023
Anterograde amnesia refers to loss of memory for events after an incident (McLeod, 2011).
Through the surgery the researchers were able to conclude that there is a strong connection between the hippocampus and a persons STM - LTM. As well as Declarative memory.
As HM's Procedural memory (e.g. playing the piano, riding a bike) was relatively intact, but had severe damage to his ability to form new declarative memories.
Throughout time they found he was able to maintain preexisting procedural memories. As well as form new procedural memory with the ability to retain for multiple days. However, struggled to recall learning these new procedural motor skills.
Through this further development by researcher were able to conclude that the hippocampus and relating areas of the brain play an integral part in forming new declarative memories. However, procedural memories are stored in other parts of the brain also. Allowing for anterograde amnesia patients such as HM to still perform procedural memory tasks such as motor skills.
Henry Molaison, the neurosurgery patient that shaped modern memory psychology. The results of his radical brain surgery provided the basis of modern understanding of how memory is formed and stored within the human brain.