A neural model of hand grip formation during reach to grasp

We investigate the spatio temporal dynamics of hand pre-shaping during prehension through a biologically plausible neural network model. It is proposed that the hand grip formation in prehension can be understood in terms of basic motor programs that can be rescaled both spatially and temporally to accommodate different task demands. The model assumes a timing coordinative role to propioceptive reafferent information generated by the reaching component of the movement, avoiding the need of a pre-organized functional temporal structure for the timing of prehension as some previous models have proposed. Predictions of the model in both normal and altered initial hand aperture conditions match key kinematic features present in human data. The differences between the proposed model and previous models predictions are used to try to identify the major principles underlying prehensile behavior.

[1]  José Luis Contreras-Vidal,et al.  A neural model of basal ganglia-thalamocortical relations in normal and parkinsonian movement , 1995, Biological Cybernetics.

[2]  G. Rizzolatti,et al.  Influence of different types of grasping on the transport component of prehension movements , 1991, Neuropsychologia.

[3]  T. Ebner,et al.  Neuronal specification of direction and distance during reaching movements in the superior precentral premotor area and primary motor cortex of monkeys. , 1993, Journal of neurophysiology.

[4]  S. Grossberg,et al.  Neural dynamics of planned arm movements: emergent invariants and speed-accuracy properties during trajectory formation. , 1988, Psychological review.

[5]  Juan López Coronado,et al.  A Neural Model of Spatio Temporal Coordination in Prehension , 2002, ICANN.

[6]  G. Stelmach,et al.  Grip reorganization during wrist transport: the influence of an Altered aperture , 1996, Experimental Brain Research.

[7]  M. Jeannerod,et al.  Orienting the finger opposition space during prehension movements. , 1994, Journal of motor behavior.

[8]  J. R. Bloedel,et al.  Grasping component alterations and limb transport , 1996, Experimental Brain Research.

[9]  S. Vogt,et al.  Multijoint grasping movements , 2001, Experimental Brain Research.

[10]  C. Bard,et al.  Role of the feedforward command and reafferent information in the coordination of a passing prehension task , 1999, Experimental Brain Research.

[11]  Eli Brenner,et al.  Does a complex model help to understand grasping? , 2002, Experimental Brain Research.

[12]  Daniel Bullock,et al.  Neural dynamics of planned arm movements: emergent invariants and speed-accuracy properties during trajectory formation , 1988 .

[13]  J. A. Scott Kelso,et al.  Temporal constraints in reaching and grasping behavior , 1990 .

[14]  E. Brenner,et al.  A new view on grasping. , 1999, Motor control.

[15]  M A Arbib,et al.  Schemas for the temporal organization of behaviour. , 1985, Human neurobiology.

[16]  M. Jeannerod.  The timing of natural prehension movements. , 1984, Journal of motor behavior.

[17]  S. Vogt,et al.  Multijoint grasping movements. Simulated and observed effects of object location, object size, and initial aperture. , 2001, Experimental brain research.

[18]  J. F. Soechting,et al.  Gradual molding of the hand to object contours. , 1998, Journal of neurophysiology.

[19]  Juan López Coronado,et al.  Neural dynamics of hand pre-shaping during prehension , 2001, 2001 IEEE International Conference on Systems, Man and Cybernetics. e-Systems and e-Man for Cybernetics in Cyberspace (Cat.No.01CH37236).

[20]  E. Montgomery,et al.  Motor initiation versus execution in normal and Parkinson's disease subjects , 1991, Neurology.

[21]  P Cordo,et al.  Central and peripheral coordination in movement sequences , 1993, Psychological research.