London: Sensitivity to touch is heritable and apparently linked to hearing as well, according to a new study.Gary Lewin and colleagues at the Max Delbruck Center for Molecular Medicine in Berlin, Germany, gauged touch in 100 healthy pairs of fraternal and identical twins.The researchers tested finger sensitivity in two distinct methods: by response to a high-frequency vibration and the ability to identify the orientation of very fine grating.Lewin`s team found that up to 50 per cent of the variation in sensitivity to touch was genetically determined. Audio tests also showed that those with good hearing were more likely to have sensitive touch. The link between the two is logical, as both touch and hearing rely on sensory cells that detect mechanical forces, New Scientist reported.
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