What can be learned from Smeets and Brenners model about the control of grasping?
SourceMotor Control, 3, (1999), pp. 302-306
Article / Letter to editor
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SW OZ DCC CO
SubjectAction, intention, and motor control
The present reaction on the paper of Smeets and Brenner focuses on two premises of their proposed model. The first premise is that grasping is nothing more than pointing with two fingers. It is argued that this assumption cannot be upheld in the light of differences between both actions with respect to neuromuscular structures, muscular innervation, use of visual feedback and basic function. The second premise of the model is that the velocity profile of the transport component is symmetrical and independent of intrinsic object properties. It is shown that the symmetrical velocity profile represents a boundary condition and is influenced by intrinsic object properties. Given these concerns, it is doubtful that the model in its present form will add much to our understanding of the control of grasping.
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