Brodmann area 46

Brodmann area 46
Brain: Brodmann area 46
Brodmann area 46.png
Brodmann Cytoarchitectonics 46.png
Latin Area frontalis media
NeuroLex ID birnlex_1778

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

BA46 is known as middle frontal area 46. In the human brain 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), although 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, BA46 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 extent of BA8 (Brodmann-1905) and the same area as described by Walker (1940)[1]

Contents

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 as well as causing problems in organization.

The DLPFC has recently been found to be involved in exhibiting self-control. http://sciencenow.sciencemag.org/cgi/content/full/2009/501/3

The dorsolateral prefrontal cortex, which is one of the few areas deactivated during REM sleep. Neuroscientist J. Allan Hobson has hypothesized that activation of the dorsolateral prefrontal cortex produce lucid dreams.

Image

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

  • For Neuroanatomy of the area visit BrainInfo

See also



Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Brodmann area 10 — Brodmann area 10, or BA10, is part of the frontal cortex in the human brain. BA10 encompasses the most anterior part of the frontal cortex, known as the frontopolar region. This area is believed to play a part in strategic processes involved in… …   Wikipedia

  • Brodmann area 11 — is one of Brodmann s cytologically defined regions of the brain. It is involved in planning, reasoning, and decision making.HumanBrodmann area 11, or BA11, is part of the frontal cortex in the human brain. BA11 covers the medial part of the… …   Wikipedia

  • Brodmann area 22 — is one of Brodmann s cytologically defined regions of the brain. It is involved in auditory processing.HumanBrodmann area 22 is a region of the human brain (the 22nd numbered Brodmann area). On the left side of the brain this area helps with… …   Wikipedia

  • Brodmann area 23 — (BA23) is a region in the brain corresponding to some portion of the posterior cingulate cortex. It lies between Brodmann area 30 and Brodmann area 31 and is located on the medial wall of the cingulate gyrus between the callosal sulcus and the… …   Wikipedia

  • Brodmann area 7 — is one of Brodmann s cytologically defined regions of the brain. It is involved in locating objects in space. It serves as a point of convergence between vision and proprioception to determine where objects are in relation to parts of the… …   Wikipedia

  • Brodmann area 5 — is one of Brodmann s cytologically defined regions of the brain. It is involved in somatosensory processing.HumanBrodmann area 5 is part of the parietal cortex in the human brain. It is situated immediately posterior to the primary somatosensory… …   Wikipedia

  • Brodmann area 15 — Brodmann s Area 15 is one of Brodmann s subdivisions of the cerebral cortex in the brain. Area 15 was defined by Brodmann in the guenon monkey, but he found no equivalent structure in humans. However, functional imaging experiments have found… …   Wikipedia

  • Brodmann area 26 — is the name for a small part of the brain.HumanIn the human this area is called ectosplenial area 26. It is a cytoarchitecturally defined portion of the retrosplenial region of the cerebral cortex. It is a narrow band located in the isthmus of… …   Wikipedia

  • Brodmann area 39 — Brodmann area 39, or BA39, is part of the parietalcortex in the human brain. BA39 encompasses the angular gyrus, lying near to the junction of temporal, occipital and parietal lobes.This area is also known as angular area 39 (H). It corresponds… …   Wikipedia

  • Brodmann area 25 — (BA25) is an area in the cerebral cortex of the brain and delineated based on its cytoarchitectonic characteristics. It is also called the subgenual area or area subgenualis . It is the 25th Brodmann area defined by Korbinian Brodmann (thus its… …   Wikipedia

  • Brodmann area 13 — is a subdivision of the cerebral cortex as defined on the guenon monkey and on the basis of cytoarchitecture. Along with Brodmann area 14 and 15, Brodmann area 13 is found only in primates and no equivalent structure exists in… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”