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20 October 2015

At 4 months, babies don't relate touch to other senses

Up until four months of age, infants can't really place the origin of tickle, a new study suggests.

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When you touch a newborn's hands or feet, the infant doesn't identify that sensation the same way older babies, children and adults do, a new study suggests.

This situation lasts for about the first four months of a baby's life, according to the results published in the journal Current Biology.

A dizzying idea

"Our findings are really the first to address what is quite a fundamental question about our sensory experience in early life," Andrew Bremner of Goldsmiths, University of London, said in a journal news release. "When young babies feel a touch on their hand, can they appreciate where that touch is in the outside world?"

Infographic: Our baby's instinctive reflexes

The answer is no, revealed the tickling tests on the feet of 4- and 6-month-old infants.

"We think this means that before around 6 months of age, human babies perceive touches just on their bodies, and not in the external world. If one tries to imagine what this must be like it's a bit of a dizzying idea," Bremner said.

The researchers said that young babies perceive touches as just touches on the body. They don't perceive them as being related to what they see, hear or maybe even smell, Bremner explained.

"Touches are not related to objects perceived in vision. To me this sounds like quite an alien sensory world to live in the tactile world being quite separate from the other sensory worlds," Bremner said.

The next phase of this research is to learn how and why infants develop a sense of themselves in the world, the investigators said.

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Image: Mother and baby from iStock

 
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