Whistled Turkish language uses both sides of brain equally

London, Aug 18 (IANS) In perception of a Turkish language – whistled Turkish – both hemispheres of the brain get equally involved, new research has found, debunking the common theory that the left brain hemisphere is dominant in the processing of all languages.

A small group of people in the mountainous north-eastern part of Turkey use whistled language which can be heard over distances of several kilometres.

Whistled Turkish contains the same vocabulary and follows the same grammatical rules as Turkish.

“It is simply a different format, in the same way as written and spoken Turkish are,” said Onur Gunturkun from Ruhr University Bochum in Germany.

To date, it has been assumed that the perception of all spoken languages written texts and even sign language involves the left brain hemisphere more strongly than the right one.

The new study has discovered that whistled Turkish is an exception.

“We can count ourselves lucky that such a language exists – namely whistled Turkish,” Gunturkun noted.

The researchers tested 31 inhabitants of Kukoy, a village in Turkey, who speak Turkish and whistle it as well.

Via headphones, they were presented either whistled or spoken Turkish syllables.

In some test runs, they heard different syllables in both ears, in other runs the same syllables.

They were asked to state which syllable they had perceived.

The left brain hemisphere processes information from the right ear, the right hemisphere from the left ear.

For spoken Turkish, a clear asymmetry emerged: If the participants heard different syllables, they perceived the syllables from the right ear much more frequently – a dominance of the left brain hemisphere.

That asymmetry did not exist in whistled Turkish.

The findings were detailed in the journal Current Biology.

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