Motor Unit Anatomy
A group of muscle fibres that respond to a stimulus from a single motor neuron. The physiological and anatomical properties of mammalian motor units are discussed and the results of human and animal studies are compared.
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Motor unit anatomy. In the extraocular muscles a motor unit consists of less than a dozen small fibres that is considered to be a small unit. The concept was proposed by charles scott sherrington. A motor unit is a motor neuron and all of the.
Good questionthis question is almost guaranteed to appear on your level 3 anatomy and physiology exam. A motor unit is composed of a motor neuron and all of the muscle fibers ie muscle cells it innervates. Groups of motor units often work together to coordinate the contractions of a single muscle.
It produces a finer degree of neural control over contraction than a larger unit which produces more powerful gross movements when activated. A motor unit is made up of a motor neuron and the skeletal muscle fibers innervated by that motor neurons axonal terminals. All of the motor units within a muscle are considered a motor pool.
English aw wolf sl. A motor unit consists of one alpha motor neuron together with all the muscle fibers it stimulates. View slideshow of images above.
What is a motor unit. Motor neurons that are part of a motor unit have elongated axons that run through the spinal cord. Alternatively a motor unit is a group of muscle fibers innervated by a single motor neuron.
A physiological organization of motor units based on the mechanical properties of their associated muscle units is examined.
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