Authors:
Sachiko Takahama and Jun Saiki

Title:
Functional connectivity supporting the selective maintenance of
feature-location binding in visual working memory.

Journal(書誌情報）:
Frontiers in Psychology, 5, 507

doi:
10.3389/fpsyg.2014.00507

論文URL:

Abstract:
Information on an object’s features bound to its location is very
important for maintaining object representations in visual working
memory. Interactions with dynamic multi-dimensional objects in an
external environment require complex cognitive control, including the
selective maintenance of feature-location binding. Here, we used
event-related functional magnetic resonance imaging to investigate
brain activity and functional connectivity related to the maintenance
of complex feature-location binding. Participants were required to
detect task-relevant changes in feature-location binding between
objects defined by color, orientation, and location. We compared a
complex binding task requiring complex feature-location binding
(color-orientation-location) with a simple binding task in which
simple feature-location binding, such as color-location, was
task-relevant and the other feature was task-irrelevant. Univariate
analyses showed that the dorsolateral prefrontal cortex (DLPFC),
hippocampus, and frontoparietal network were activated during the
maintenance of complex feature-location binding. Functional
connectivity analyses indicated cooperation between the inferior
precentral sulcus (infPreCS), DLPFC, and hippocampus during the
maintenance of complex feature-location binding. In contrast, the
connectivity for the spatial updating of simple feature-location
binding determined by reanalyzing the data from Takahama et al. (2010)
demonstrated that the superior parietal lobule (SPL) cooperated with
the DLPFC and hippocampus. These results suggest that the connectivity
for complex feature-location binding does not simply reflect general
memory load and that the DLPFC and hippocampus flexibly modulate the
dorsal frontoparietal network, depending on the task requirements,
with the infPreCS involved in the maintenance of complex
feature-location binding and the SPL involved in the spatial updating
of simple feature-location binding.

著者Contact先の email:
takahama.sachiko[at]gmail.com


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