The plot thickens... grin... and this is still just on the reactive side of the question, and still only dealing with the friction / control issue in the greater question of just how tight to pin the centers... Ya gots to love it. Thanks Isaac. I havent had a chance to read carefully through this whole article yet. Cheers RicB Isaac OLEG wrote: >Exerps of the same paper : > >Reflexes are fully automatic movements. This paper however focuses on >rapid intentionally changes. A distinction should be made between the >motor programs of reflexes and the motor programs influenced by >proprioceptive, senso-motori and kinaesthetic information. Think for >example about the reflex of you hand when you grab a hot object (= >withdrawal reflex). This is a completely automatic and non-intentional >act. Now imagine that your hand reaches for a glass of water with the >intention of drinking it. While you are talking to a friend, the hand, >without being conscious aware of it, shapes itself in a precise way >for picking up the glass. This is a movement which contains at least >some part of intentionality. > >Proprioception: sense of position of the limbs and trunk (knowing >where your body is in space) >Kinesthesis: sense of movement in the limbs and trunk (the experience >of movement in your body through space) > >What is interesting to know, is that visual information has been >demonstrated to affect performance negatively in movement situations >that require rapid responses. Jordan (1972) studied a group of elite >fencers and found that they actually responded much faster to an >opponent's advancing blade when deprived of any visual information. In >the absence of vision, the athletes were utilising the faster >somatosensory cues provided by cutaneous receptors and proprioceptors. >This means actually that the cutaneous receptors and proprioceptors >are faster than the visual receptors (Rose, 1995).Proprioceptive >information is very useful in the making of rapid bodily changes. >The body challenges its own destination: it postpones, changes and >alternates the movement(s) until the before and after movement >onset..Every movement decision can be replaced by another and again >another movement decision. This is a body in a continuous state of >alertness. > > > >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives > > >
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