Editing Long-term memory (section)

{{Short description|Process of storage and retrieval memory}}
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'''Long-term memory''' ('''LTM''') is the stage of the [[Atkinson–Shiffrin memory model]] in which informative knowledge is held indefinitely. It is defined in contrast to [[sensory memory]], the initial stage, and [[Short-term memory|short-term]] or [[working memory]], the second stage, which persists for about 18 to 30 seconds. LTM is grouped into two categories known as [[explicit memory]] (declarative memory) and [[implicit memory]] (non-declarative memory). Explicit memory is broken down into [[Episodic memory|episodic]] and [[semantic memory]], while implicit memory includes [[procedural memory]] and emotional conditioning.