The Medial Temporal Lobe Supports Conceptual Implicit Memory

Wei Chun Wang, Michele M. Lazzara, Charan Ranganath, Robert T. Knight, Andrew P. Yonelinas

Research output: Contribution to journalArticlepeer-review

78 Scopus citations


The medial temporal lobe (MTL) is generally thought to be critical for explicit, but not implicit, memory. Here, we demonstrate that the perirhinal cortex (PRc), within the MTL, plays a role in conceptually-driven implicit memory. Amnesic patients with MTL lesions that converged on the left PRc exhibited deficits on two conceptual implicit tasks (i.e., exemplar generation and semantic decision). A separate functional magnetic resonance imaging (fMRI) study in healthy subjects indicated that PRc activation during encoding of words was predictive of subsequent exemplar generation. Moreover, across subjects, the magnitude of the fMRI and behavioral conceptual priming effects were directly related. Additionally, the PRc region implicated in the fMRI study was the same region of maximal lesion overlap in the patients with impaired conceptual priming. These patient and imaging results converge to suggest that the PRc plays a critical role in conceptual implicit memory, and possibly conceptual processing in general.

Original languageEnglish (US)
Pages (from-to)835-842
Number of pages8
Issue number5
StatePublished - Dec 9 2010

ASJC Scopus subject areas

  • Neuroscience(all)


Dive into the research topics of 'The Medial Temporal Lobe Supports Conceptual Implicit Memory'. Together they form a unique fingerprint.

Cite this