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- Motor_unit abstract "A motor unit is made up of a motor neuron and the skeletal muscle fibers innervated by that motor neuron's axonal terminals. Groups of motor units often work together to coordinate the contractions of a single muscle; all of the motor units within a muscle are considered a motor pool.All muscle fibers in a motor unit will be of the same fiber type. When a motor unit is activated, all of its fibers contract. In vertebrates, control of muscle contraction force is accomplished by controlling how many motor units are activated for a given motion.The number of muscle fibers within each unit can vary within a particular muscle and still more widely from muscle to muscle; the muscles that act on the largest body masses have motor units that contain more muscle fibers, whereas smaller muscles contain less muscle fibers in each motor unit. For instance, thigh muscles can have a thousand fibers in each unit, while extraocular muscles might have ten. Additionally, muscles which possess more motor units (and thus more individual motor neuron innervation) are able to control force output more finely.Motor units are organized slightly differently in invertebrates; each muscle has few motor units (typically less than 10), and each muscle fiber is innervated by multiple neurons, including excitatory and inhibitory neurons. Thus, while the force of contraction of muscles in vertebrates is regulated by how many motor units are activated, in invertebrates thia is controlled by regulating the balance between excitatory and inhibitory signals.".
- Motor_unit wikiPageExternalLink neuron.htm.
- Motor_unit wikiPageID "422470".
- Motor_unit wikiPageRevisionID "606606633".
- Motor_unit date "January 2013".
- Motor_unit hasPhotoCollection Motor_unit.
- Motor_unit reason "Article needs huge amount of cleanup, wikification, etc. Version of 12 Nov 2012 is actually much superior.".
- Motor_unit subject Category:Somatic_motor_system.
- Motor_unit comment "A motor unit is made up of a motor neuron and the skeletal muscle fibers innervated by that motor neuron's axonal terminals. Groups of motor units often work together to coordinate the contractions of a single muscle; all of the motor units within a muscle are considered a motor pool.All muscle fibers in a motor unit will be of the same fiber type. When a motor unit is activated, all of its fibers contract.".
- Motor_unit label "Jednostka motoryczna".
- Motor_unit label "Motor unit".
- Motor_unit label "Motorische Einheit".
- Motor_unit label "Unidade motora".
- Motor_unit label "Unità motoria".
- Motor_unit label "Unité motrice".
- Motor_unit label "運動単位".
- Motor_unit sameAs Motorische_Einheit.
- Motor_unit sameAs Unité_motrice.
- Motor_unit sameAs Unità_motoria.
- Motor_unit sameAs 運動単位.
- Motor_unit sameAs Jednostka_motoryczna.
- Motor_unit sameAs Unidade_motora.
- Motor_unit sameAs m.026m4z.
- Motor_unit sameAs Q1889028.
- Motor_unit sameAs Q1889028.
- Motor_unit wasDerivedFrom Motor_unit?oldid=606606633.
- Motor_unit isPrimaryTopicOf Motor_unit.