Broca's area

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Broca's area
Broca’s area - BA44 and BA45.png
Broca's area is made up of Brodmann areas 44 (pars opercularis) and 45 (pars triangularis)
Broca's area - lateral view.png
Broca's area (shown in red)
Details
Part ofFrontal lobe
ArteryMiddle cerebral
VeinSuperior sagittal sinus
Identifiers
MeSHD065711
NeuroNames2062
FMA242176
Anatomical terms of neuroanatomy

Broca's area is a region in the brain of humans and other hominids. It is in the frontal lobe of the dominant hemisphere, usually the left.[1] It works as part of "speech production".

Language processing has been linked to Broca's area after Pierre Paul Broca. Broca did autopsies on patients who had difficuty speaking when they were alive. He found damage to a particular area of the brain.[2][3] They had lost the ability to speak after injury to the posterior inferior frontal gyrus of the brain.[4]

Since then, the region he identified has become known as Broca's area. The deficit in language production is Broca's aphasia, also called 'expressive aphasia'.[4]

Functional magnetic resonance imaging (fMRI) studies have identified activation patterns in Broca's area associated with various language tasks. However, slow destruction of the Broca's area by brain tumors can leave speech relatively intact. This suggests that, given time, its functions can shift to nearby areas in the brain.[5]

Related pages[change | change source]

References[change | change source]

  1. Cantalupo, Claudio & Hopkins, William D. 2001. "Asymmetric Broca's area in great apes". Nature 414 (6863): 505. doi:10.1038/35107134. PMC 2043144. PMID 11734839. 
  2. Boeree C.G. (2004). "Speech and the brain".
  3. Kennison, Shelia (2013). Introduction to language development. Los Angeles: Sage.
  4. 4.0 4.1 Dronkers N.F. et al 2007. "Paul Broca's historic cases: high resolution MR imaging of the brains of Leborgne and Lelong". Brain 130 (Pt 5): 1432–1441. doi:10.1093/brain/awm042. PMID 17405763. 
  5. Plaza M. et al 2009. "Speaking without Broca's area after tumor resection". Neurocase 15 (4): 294–310. doi:10.1080/13554790902729473. PMID 19274574.