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Study: Brain makes call on which ear is used for cell phone
Date:5/16/2013

there would be far more people diagnosed with cancer on the right side of their brain, head and neck, the dominant side for cell phone use. It's likely, he says, that the development of tumors is more "dose-dependent" based on cell phone usage.

The study began with the simple observation that most people use their right hand to hold a cell phone to their right ear. This practice, Dr. Seidman says, is illogical since it is challenging to listen on the phone with the right ear and take notes with the right hand.

To determine if there is an association between sidedness of cell phone use and auditory or language hemispheric dominance, the Henry Ford team developed an online survey using modifications of the Edinburgh Handedness protocol, a tool used for more than 40 years to assess handedness and predict cerebral dominance.

The survey included questions about which hand was used for tasks such as writing; time spent talking on cell phone; whether the right or left ear is used to listen to phone conversations; and if respondents had been diagnosed with a brain or head and neck tumor.

It was distributed to 5,000 individuals who were either with an otology online group or a patient undergoing Wada and MRI for non-invasive localization purposes.

On average, respondents' cell phone usage was 540 minutes per month. The majority of respondents (90%) were right handed, 9% were left handed and 1% was ambidextrous.

Among those who are right handed, 68% reported that they hold the phone to their right ear, while 25% used the left ear and 7% used both right and left ears. For those who are left handed, 72% said they used their left ear for cell phone conversations, while 23% used their right ear and 5% had no preference.

The study also revealed that having a hearing difference can impact ear preference for cell phone use.

In all, the study found that there is a correlation between brain dominance and lat
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Contact: Krista Hopson
khopson1@hfhs.org
313-874-7207
Henry Ford Health System
Source:Eurekalert

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