London, Jun 28 (IANS): Sending text messages on a smartphone or iPad can change the rhythm of brain waves in humans -- a finding that has significant implications for brain-computer interfacing, gaming and driving.

People communicate increasingly via text messaging, though little is known on the neurological effects of smartphone use.

To find out more about how our brains work during textual communication using smartphones, a team led by Mayo Clinic researcher William Tatum analysed data from 129 patients.

Their brain waves were monitored over a period of 16 months through electroencephalograms (EEGs) combined with video footage.

Dr Tatum found a unique 'texting rhythm' in approximately one in five patients who were using their smartphone to text message while having their brain waves monitored.

"We believe this new rhythm is an objective metric of the brain's ability to process non-verbal information during use of electronic devices and that it is heavily connected to a widely distributed network augmented by attention or emotion," Dr Tatum commented.

The researchers asked patients to perform activities such as message texting, finger tapping and audio cellular telephone use in addition to tests of attention and cognitive function.

Only text messaging produced the newly observed brain rhythm, which was different than any previously described brain rhythm.

The unicity of the texting rhythm compared to other forms of mental stimulation could be caused by the combination of mental activity with motor and auditory-verbal neurological activity.

The 'texting rhythm' was also found in iPad users.

The researchers hypothesised that the presence of a different brain wave rhythm while using mobile, handheld devices might be caused by their smaller screens, which require more concentration.

“There is now a biological reason why people shouldn't text and drive - texting can change brain waves,” Dr Tatum added in a paper published in the journal Epilepsy & Behavior.