Motor unit recruitment for dynamic tasks: current understanding and future directions.

摘要: Skeletal muscle contains many fibres that are functionally grouped into motor units. For any task there possible combinations of units could be recruited and it has been proposed a simple rule, the 'size principle', governs selection for different contractions. Motor can characterised by their contractile, energetic fatigue properties is important given movements allows with appropriate to activated. Here we review what currently understood about unit recruitment patterns, assess how patterns more or less movement tasks. During natural vary (not always holding size principle) likely related mechanical function muscles. Many factors such as mechanics, sensory feedback, central control influence consequently an integrative approach (rather than reductionist) required understand controlled during Currently, best way achieve this through in vivo studies relate mechanics behaviour. Various methods determining discussed, particular recent wavelet-analysis approaches have allowed assessed movements. Directions future within between functional groups compartments suggested.