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The long-term declarative memory was crucially affected when the structures from the medial temporal lobe were removed, including the ability to form new semantic knowledge and memories. [31] The dissociation in Molaison between the acquisition of declarative memory and other kinds of learning was seen initially in motor learning. [32]
Semantic memory and episodic memory are both types of explicit memory (or declarative memory), or memory of facts or events that can be consciously recalled and "declared". [4] The counterpart to declarative or explicit memory is implicit memory (also known as nondeclarative memory). [5]
Declarative, or explicit memory, is the conscious storage and recollection of data. [10] Under declarative memory resides semantic and episodic memory. Semantic memory refers to memory that is encoded with specific meaning. [2] Meanwhile, episodic memory refers to information that is encoded along a spatial and temporal plane.
The main difference between the two types of long-term memory is how implicit memory lives in the subconscious mind, whereas explicit memory comes from conscious thought, says Papazyan.
Declarative memory uses your medial temporal lobe and enables you to recall the telephone number at will. Procedural memory activates the telephone number only when you are at the telephone, and uses your right-hemisphere's skill, pattern recognition. Research indicates declarative and habit memory compete with each other during distraction. [1]
The difference between procedural and declarative memory systems were first explored and understood with simple semantics. Psychologists and philosophers began writing about memory over two centuries ago. "Mechanical memory" was first noted in 1804 by Maine de Biran.
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 or working memory, the second stage, which persists for about 18 to 30 seconds.
The multiple memory system theory ascribes the differences in implicit and explicit memory to the differences in the underlying structures. The theory says that explicit memories are associated with a declarative memory system responsible for the formation of new representations or data structures.