Brodmann area 46

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Brodmann area 46, or BA46, is part of the frontal cortex in the human brain. It is sandwiched between BA10 and BA45.

This area is known as middle frontal area 46. In the human it occupies approximately the middle third of the middle frontal gyrus and the most rostral portion of the inferior frontal gyrus. Brodmann area 46 roughly corresponds with the dorsolateral prefrontal cortex (DLPFC), though the borders of area 46 are based on cytoarchitecture rather than function. The DLPFC also encompasses part of granular frontal area 9, directly adjacent on the dorsal surface of the cortex.

Cytoarchitecturally, area 46 it is bounded dorsally by the granular frontal area 9, rostroventrally by the frontopolar area 10 and caudally by the triangular area 45 (Brodmann-1909). There is some discrepancy between the exetent of Brodman's area 8 (1905) and the same area as described by Walker (1940)[1]

Function

The DLPFC plays a role in sustaining attention and working memory. Lesions to the DLPFC impair short-term memory and cause difficulty inhibiting responses. Lesions may also eliminate much of the ability to make judgements about what's relevant and what's not.

References

  1. Petrides, M., Pandya, D.M., (1999) Dorsolateral prefrontal cortex: comparative cytoarchitectonic analysis in the human and the macaque brain and corticocortical connection patterns. European Journal of Neuroscience, Vol. 11, pp. 1011–1036
  • Petrides, M., Pandya, D.M., (1999) Dorsolateral prefrontal cortex: comparative cytoarchitectonic analysis in the human and the macaque brain and corticocortical connection patterns. European Journal of Neuroscience, Vol. 11, pp. 1011–1036

External links

See also



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