Kent Cochrane (August 5, 1951 – March 27, 2014), also known as Patient K.C., was a widely studied Canadian memory disorder patient who has been used as a case study in over 20 neuropsychology papers over the span of the past 25 years. In 1981, Cochrane was involved in a motorcycle accident that left him with severe anterograde amnesia, as well as temporally graded retrograde amnesia. Like other amnesic patients (patient HM, for example), Cochrane had his semantic memory intact, but lacked episodic memory with respect to his entire past. As a case study, Cochrane has been linked to the breakdown of the single-memory single-locus hypothesis regarding amnesia, which states that an individual memory is localized to a single location in the brain.