moottoriyksiköitä
Moottoriyksiköitä, often translated as "motor units," are the fundamental functional components of the muscular system. A motor unit consists of a single motor neuron and all of the muscle fibers it innervates. This means that one nerve cell is responsible for activating a specific group of muscle cells. When a motor neuron receives a signal from the central nervous system, it transmits this signal to all the muscle fibers connected to it, causing them to contract simultaneously.
The size of a motor unit can vary significantly. In muscles requiring fine motor control, such as
The recruitment of motor units is a crucial mechanism for controlling muscle force. When a weak stimulus