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Angular Gyrus




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  Caption Figure one illustrates significant language areas of the brain Brodmann Area 39 is highlighted in red
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The angular gyrus is a region of the Brain in the Parietal Lobe , that lies near the superior edge of the Temporal Lobe , and immediately posterior to the Supramarginal Gyrus ; it is involved in a number of processes related to language and cognition. It is Brodmann Area 39 of the human brain.

Geshwind proposes that written word is translated to internal monologue via the angular gyrus.

V. S. Ramachandran , director of the Center For Brain And Cognition at the University Of California, San Diego , directed a study that showed that the angular gyrus is at least partially responsible for understanding Metaphor s. Right-handed Patients who had damage to their left angular gyrus and whose speaking and comprehending English was seemingly unaffected, could not grasp the dual nature of metaphor.

Given a common metaphorical phrase, each patient could give only a literal meaning. If pressed, they could invent a wild interpretation but it was well off the mark.

In another exercise, the patients all failed to be able to describe a balbous object as "booba" and a jagged object as "kiki," whereas more than 90% of unaffected subjects succeeded in the test . This showed an inability to connect visual stimuli to language.

The fact that the angular gyrus which is proportionately much larger in hominids than other primates, and its strategic location at the crossroads of areas specialized for processing touch, hearing and vision, leads Ramachandran to believe that it is critical both to conceptual metaphors and to cross-modal abstractions more generally.