Dorsolateral Frontal System
Structure
The dorsolateral prefrontal cortex (DLPFC) is located on the convexity of the prefrontal cortex, superior to orbital frontal cortex and anterior to the premotor cortex. Architectonically, it is composed of granular neurons distinct from the pyramidal cells of the adjacent motor cortex. The DLPFC includes at least Brodmann areas 9 and 46, the areas that are homologous to those surrounding the principal sulcus in lower primates, which have been shown to be important in working memory (WM) function (see below). Some researchers include other frontal zones in the DLPFC, including parts of Brodmann areas 8 through 12, 45, 46, and 47, though 44, 45, and 47/12 have also been characterized as ventrolateral prefrontal cortex (Diamond, 2002).
Dendrites in the DLPFC reach full maturity by the age of 12 months, plateauing in length until at least age 27 years (Diamond, 2002). Glucose metabolism also reaches adult levels by 12 months. However, synaptic density continues to decrease,...
References and Readings
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