Relation between velocity and curvature of the trajectory in cursive handwriting

The 2/3 power law links the kinematics of handwriting with a movement trajectory but lack of precision for handwriting movement. In order to study a more appropriate relationship between velocity and curvature in handwriting movements we examined the writing responses of 204 children from 2nd and 5th primary school. Cursive writing was acquired by a digital tablet and its dynamic aspects were studied in five different experimental conditions:two repetitive sequences of le and uno, a series of numbers (in letters) in ascending order and a sentence written in accurate and fast conditions. We found a limit law that identify the maximum velocity required to perform a specific curvature.