Kinesiology 4430F/G Lecture Notes - Lecture 4: Proportional Control, Functional Electrical Stimulation, Anatomical Terms Of Motion
15 Jun 2016
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Fast ones are really hard to activate (short intensity, maximum efforts) Looked at the concentration of glycogen in the muscle. Glycogen concentration quickly declined in slow twitch. Even at exhaustion, the fast ones have been relatively unused: it is really hard to activate the big fibres for long periods of time. All mu types used, but type iib used much less. It is really hard to change the order. It works very well so there is not much need to change the order. In special situations you may be able to change the order but not reverse the order: maybe in fight or flight or life and death situations. Special tasks or conditions such as: lengthening vs. shortening vs. isometric differences in number or kind, different tasks: biceps for flexion vs. supination different set of mus. Fundamental order wont change but you might task different parts of the order differently: cat paw-shake (rapid alternating movements): slow mus may be inhibited.
