Why the left hemisphere of the brain understands language better than the right

ScienceDaily | 7/12/2018 | Staff
DebraS (Posted by) Level 3
A new form of magnetic resonance imaging (MRI) in combination with electroencephalography (EEG) measurements has made it possible to bundle insights into the microstructure of planum temporale with the speed of auditory speech processing. The team headed by Dr Sebastian Ocklenburg, Patrick Friedrich, Christoph Fraenz, Prof Dr Dr h. c. Onur Güntürkün and Dr Erhan Genç outlines their findings in an article published in the scientific journal Science Advances from July 11, 2018.

Using a simple experiment, researchers can demonstrate just how superior the left hemisphere is when it comes to the processing of auditory speech: when playing two different syllables -- for example "Da" and "Ba" -- to a person's left and right ear via headphones, most people will state that they only heard the syllable in the right ear. The reason: language that is perceived via the right ear is processed in the left hemisphere. When brainwaves are measured using EEG, it emerges that the left hemisphere processes auditory speech information more rapidly.

Researchers - Brain - Region - Processing - Auditory

"Researchers have long determined that a brain region that is crucial for the processing of auditory speech, i.e. planum temporale, is frequently larger in the left hemisphere than in the right one," says Sebastian Ocklenburg from the biopsychology research unit in Bochum. In the brains of deceased individuals who had donated their bodies to science, Frankfurt-based researchers later discovered that the nerve cells in the left planum temporale have a larger number of neuronal...
(Excerpt) Read more at: ScienceDaily
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