Editing Long-term memory (section)

===Traumatic brain injury===
The majority of findings on memory have been the result of studies that [[lesion]]ed specific brain regions in rats or primates, but some of the most important work has been the result of accidental or inadvertent brain trauma. The most famous case in recent memory studies is the case study of [[HM (patient)|HM]], who had parts of his hippocampus, [[parahippocampal cortex|parahippocampal cortices]], and surrounding tissue removed in an attempt to cure his [[epilepsy]]. His subsequent total [[anterograde amnesia]] and partial [[retrograde amnesia]] provided the first evidence for the localization of memory function, and further clarified the differences between declarative and procedural memory.