![]() ![]() It has often been assumed that each nucleus can support a certain volume of cytoplasm, and hence that there is a constant volume domain served by each nucleus, although recent evidence suggests that this is an oversimplification. During such fiber enlargement muscle stem cells in the muscle tissue multiply and fuse with pre-existing fibers as to support the larger cellular volume. Strength-training increases muscle mass and force mainly by changing the caliber of each fiber rather than increasing the number of fibers. Such multinucleated cells are called syncytia. To support this large volume, the muscle cells are one of the very few in the mammalian body that contain several cell nuclei. ![]() The muscle cells are the largest cells in the body with a volume thousands of times larger than most other body cells. Muscle memory is probably related to the cell nuclei residing inside the muscle fibers, as is described below. The notion of a memory mechanism residing in the muscle fibers might have implications for health related exercise advice, and for exclusion times after doping offences. For strength training this view was recently challenged by using in vivo imaging techniques revealing specific long lasting structural changes in muscle fibers after a strength-training episode. Until recently it was generally assumed that the effects of exercise on muscle was reversible, and that after a long period of de-training the muscle fibers returned to their previous state. Long-term effects of previous training on the muscle fibers themselves, however, have recently also been observed related to strength training. Until recently such effects were attributed solely to motor learning occurring in the central nervous system. The term could relate to tasks as disparate as playing the clarinet and weight-lifting, i.e., the observation that strength trained athletes experience a rapid return of muscle mass and strength even after long periods of inactivity. Muscle memory has been used to describe the observation that various muscle-related tasks seem to be easier to perform after previous practice, even if the task has not been performed in a while. ( Learn how and when to remove this template message) ( September 2013) ( Learn how and when to remove this template message) ![]() Please help improve it to make it understandable to non-experts, without removing the technical details. Esculpidos toscamente, los animales que emergen de las cerámicas de Parsons no se revelan hasta que se aplica el esmalte con pinceladas sueltas pero cuidadosamente colocadas que les dan vida.This article may be too technical for most readers to understand. Las esculturas de Parsons – a la vez escarpadas y delicadas - son un ejercicio de memoria muscular mientras moldea la arcilla. El roce de su mano contra la página crea campos de humo contra los cuales sus líneas aparecen y desaparecen. Al dibujar, Parsons guía suavemente los lápices en una página con los dedos de la otra mano y da como resultado una figura en movimiento similar a un boceto. Roughly sculpted, the animals that emerge from Parsons’ ceramics are not revealed until the glaze is applied with loose, yet carefully placed brush strokes that bring them to life.Ĭon discapacidad visual, David Parsons se basa en medios táctiles para completar sus dibujos y cerámicas. Parsons’ sculptures – simultaneously craggy and delicate - are an exercise in muscle memory as he shapes the clay. The rubbing of his hand against the page creates smoky fields against which his lines fade in and out. When drawing, Parsons gently guides pencils on a page with the fingers of his other hand, and results in a sketch-like quality of a figure in motion. Visually impaired, David Parsons relies on tactile means to complete his drawings and ceramics. ![]()
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