This text discusses the function and fatigue of muscles when performing actions. It highlights the importance of understanding the muscles' role and power in movements and how incorrect representation affects perception. General knowledge about muscles, including their form and function, is essential for accurate depiction and understanding.
Muscles and Their Functions.
Whether he performs a great feat or just an ordinary action. Moreover, it can also be seen with which limb or member he will exert most force. If a person remains in action for such a long time until the muscles begin to tire, a slight change then occurs; and as if some assisting muscles call for help; such that when the primary muscles begin to weaken and stop in their first strength, a decline and weakness can be observed in the action. From this, it can be clearly learned that displaying lame and slow or incorrectly performing actions comes from not understanding or properly recognizing what function or power the muscles have in their extreme or general performance. And certainly, he who does not know which muscles perform most or least, or does not perform some action proportionate to the desired action with judgment; it is impossible to represent a faithful reflection of the desired action. It should also be noted that if the muscles are incorrectly displayed in their function; or if some of their qualities are missing, then the actions cannot show a true cause from the muscles: Although they are still merely the instruments of the whole movement and actions.
Therefore, by gaining general knowledge of muscles, better regarding all said observations, we will explain in this chapter what the muscles are: What shape, location, and function they have; which can also largely be derived from their names. It is believed that the muscles or sinews...