Monday, 31 December 2012
Speaking Without Broca’s Area
From Dr. Paul Broca’s observations in the 1860s, we know that the left inferior frontal cortex of the brain, now also known as Broca’s area, is heavily involved in human language abilities. At first, this area was thought to be associated only with the production of language, but gradually its role has come to be regarded as more complex, and recent brain-imaging data have actually made the old dichotomy between language-production areas and language-understanding areas somewhat obsolete. (more…)
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Monday, 2 July 2012
Rethinking the Role of Broca’s Area in Language
In 1861, Paul Broca observed a sizable lesion in the left inferior frontal cortex of a patient who had just died. This individual had been able to understand what was said to him, but had been unable to pronounce anything but the syllable “tan”. Subsequently, this same observation was confirmed in many other individuals, and Broca’s area, whose destruction results in this form of aphasia (now known as Broca’s aphasia), thus became associated with the production of language.
But the role attributed to Broca’s area has become far more complex since these initial observations were made. In addition to the production of language, this area is now also believed to be involved in certain semantic aspects of language. For example, Dr. Peter Hagoort’s research using brain imaging shows that the dynamic association of Broca’s area with the left posterior temporal cortex is necessary for understanding language. (more…)
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