Gisa Principle

The His principle is a fundamental law in anatomy that was discovered by the German anatomist Karl His in 1868. This principle describes the location and shape of muscle fibers in skeletal muscles.

The His principle states that skeletal muscles are composed of three types of muscle fibers: slow, fast and intermediate. Slow fibers have high endurance and can contract for a long time, fast fibers can contract very quickly and briefly, and intermediate fibers occupy an intermediate position between slow and fast fibers. Thus, the His principle explains why skeletal muscle can perform various functions such as maintaining posture, running, jumping, etc.

The discovery of His principle was of great importance for the development of physiology and medicine, as it made it possible to understand how skeletal muscles work and what factors influence their work. The His principle is also used in sports medicine to determine muscle fiber type and select the optimal workout for each athlete.

In conclusion, the His principle is a fundamental law in anatomy and has wide application in medicine and sports.