Interaction between episodic and semantic memory networks in the acquisition and consolidation of novel spoken words
Takashima, A., Bakker, I., Van Hell, J. G., Janzen, G., & McQueen, J. M.
Interaction between episodic and semantic memory networks in the acquisition and consolidation of novel spoken words. Brain and Language, 167
, 44-60. doi:10.1016/j.bandl.2016.05.009.
When a novel word is learned, its memory representation is thought to undergo a process of consolidation and integration. In this study, we tested whether the neural representations of novel words change as a function of consolidation by observing brain activation patterns just after learning and again after a delay of one week. Words learned with meanings were remembered better than those learned without meanings. Both episodic (hippocampus-dependent) and semantic (dependent on distributed neocortical areas) memory systems were utilised during recognition of the novel words. The extent to which the two systems were involved changed as a function of time and the amount of associated information, with more involvement of both systems for the meaningful words than for the form-only words after the one-week delay. These results suggest that the reason the meaningful words were remembered better is that their retrieval can benefit more from these two complementary memory systems