Asymmetric haptic function and manual motor efficiency in blind children aged 6 to 14

Forty-eight congenitally blind children aged 6 to 14 were asked to discriminate and recognize Braille characters unimanually and to perform unimanual motor tasks which tested tapping ability and grip-strength. Haptic and motor efficiency scores increased with age, but no specific relationships were found between ipsilateral haptic and motor scores. Exploring Braille characters was faster in bimanual than unimanual conditions, but right-hand scores did not differ from left-hand scores. The role of blindness in manual functional asymmetry is discussed.