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eLearning

SINAPSE experts from around Scotland have developed ten online modules designed to explain medical imaging. They are freely available and are intended for non-specialists.


Edinburgh Imaging Academy at the University of Edinburgh offers the following online programmes through a virtual learning environment:

Neuroimaging for Research MSc/Dip/Cert

Imaging MSc/Dip/Cert

PET-MR Principles & Applications Cert

Applied Medical Image Analysis Cert

Online Short Courses

Investigating source memory with event-related fMRI: Are regions associated with successful retrieval during recognition memory also involved during tests of source memory?

Author(s): D. I. Donaldson, S. E. Petersen

Abstract:
We employed event-related fMRI to investigate the neural correlates of source memory. Previous studies demonstrate that conscious (explicit) memory retrieval modulates a specific network of brain regions. Lateral and medial parietal, left dorsal middle frontal gyrus and left anterior prefrontal cortex respond more for correctly recognised old than new words during old/new recognition, suggesting processes that support 'retrieval success'. We employed a source recognition task to further investigate the functional role of this network. At study subjects studied words presented in either red or green letters. At test subjects were required to discriminate between targets (words seen in one color) and nontargets (words seen in the other color and new words). The retrieval success network was modulated by previous experience, with more activity for old than new stimuli. This modulation was related to the accuracy of source memory judgments, with greater activity for old items receiving correct than incorrect responses. The network was not modulated by the requirement to remember a particular class of old item however, exhibiting equivalent response to targets and nontargets. These findings constrain functional-anatomic accounts of the network, suggesting a correlate of a relatively obligatory or automatic retrieval process rather than a controlled or intentional retrieval process that can be focused on retrieval of information from a particular source.

Full version: Available here

Click the link to go to an external website with the full version of the paper


ISBN: 0190-5295
Publication Year: 2001
Periodical: Society for Neuroscience Abstracts
Periodical Number: 1
Volume: 27
Pages: 614
Author Address: