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Este verbete ainda não foi traduzido para o seu idioma, portanto o original é exibido abaixo.
motor unit
This term is a technical anatomical designation used primarily in neurology and kinesiology. It describes the functional relationship between a single nerve cell and the specific group of muscle fibers it controls, emphasizing the concept of a functional entity rather than just a structural part.
In clinical and research settings, the term is used to discuss muscle recruitment and precision. For instance, muscles requiring fine motor control, such as those in the eye, have very small motor units, whereas power-generating muscles like the quadriceps have much larger motor units.
Meanings
Examples
Each motor unit consists of one alpha motor neuron and several muscle fibers.
The body recruits a larger motor unit when more force is required for a movement.
I wonder if the damage to the nerve affected the entire motor unit.
Small motor units allow for the fine motor skills needed to write with a pen.
The EMG reading shows the activation of a single motor unit.
Muscle atrophy occurs when the motor unit is disconnected from its nerve supply.
Let us examine how the motor unit functions during a maximum contraction.
The size principle dictates the order in which each motor unit is activated.