Analysis of hand movement to moving targets

Abstract Adult subjects were used in an examination of the way in which the hand approaches and intercepts a moving target. The speed and trajectory of the target was varied. Hand movements was analysed in terms of: the speed and direction of the initial part of the response; ongoing modifications to the speed and direction of movement; the speed and accuracy of the hand when close to the target. Results showed that the speed with which the hand moved initially was planned specifically for the target's speed and trajectory, while the direction of movement was planned only roughly. During the movement, there was usually only one adjustment to the speed of the hand, but frequent adjustments to the direction of motion. Control over the speed of movement was exercised independently of control over movement direction.

[1]  G. A. Ferguson,et al.  Statistical analysis in psychology and education , 1960 .

[2]  Laurette Hay,et al.  Contribution of visual information to feedforward and feedback processes in rapid pointing movements , 1986 .

[3]  R. Miall,et al.  Manual tracking of visual targets by trained monkeys , 1986, Behavioural Brain Research.

[4]  B. Kerr,et al.  Preplanning for aimed movements: Disruption from a preliminary task. , 1983 .

[5]  C. Hofsten.  Predictive reaching for moving objects by human infants , 1980 .

[6]  C L MacKenzie,et al.  Motor skill: feedback, knowledge, and structural issues. , 1985, Canadian journal of psychology.

[7]  C. Hofsten,et al.  Observations on the development of reaching for moving objects. , 1979, Journal of experimental child psychology.

[8]  C. Hofsten.  Catching Skills in Infancy , 1983 .

[9]  H T Whiting,et al.  Exposure and occluded duration effects in a ball-catching skill. , 1974, Journal of motor behavior.

[10]  Claes Hofsten,et al.  Visually Directed Reaching of Children with Motor Impairments , 1982, Developmental medicine and child neurology.

[11]  T. Flash,et al.  The coordination of arm movements: an experimentally confirmed mathematical model , 1985, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[12]  N. Accornero,et al.  Two joints ballistic arm movements , 1984, Neuroscience Letters.

[13]  Phillip J. Bairstow,et al.  Perceptual-motor Behaviour: Developmental Assessment and Therapy , 1985 .

[14]  Beth Kerr.  Preplanning for aimed movements , 1983 .

[15]  C. Atkeson,et al.  Kinematic features of unrestrained vertical arm movements , 1985, The Journal of neuroscience : the official journal of the Society for Neuroscience.