PET studies of encoding and retrieval: The HERA model.


Journal Article

We review positron emission tomography (PET) studies whose results converge on the hemispheric encoding/retrieval asymmetry (HERA) model of the involvement of prefrontal cortical regions in the processes of human memory. The model holds that the left prefrontal cortex is differentially more involved in retrieval of information from semantic memory, and in simultaneously encoding novel aspects of the retrieved information into episodic memory, than is the right prefrontal cortex. The right prefrontal cortex, on the other hand, is differentially more involved in episodic memory retrieval than is the left prefrontal cortex. This general pattern holds for different kinds of information (e.g., verbal materials, pictures, faces) and a variety of conditions of encoding and retrieval.

Full Text

Duke Authors

Cited Authors

  • Nyberg, L; Cabeza, R; Tulving, E

Published Date

  • June 1996

Published In

Volume / Issue

  • 3 / 2

Start / End Page

  • 135 - 148

PubMed ID

  • 24213861

Pubmed Central ID

  • 24213861

Electronic International Standard Serial Number (EISSN)

  • 1531-5320

International Standard Serial Number (ISSN)

  • 1069-9384

Digital Object Identifier (DOI)

  • 10.3758/bf03212412


  • eng