motor fibers

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mo·tor fi·bers

nerve fibers that transmit impulses that activate effector cells, for example, in muscle or gland tissue.

mo·tor fi·bers

(mō'tŏr fī'bĕrz)
Nerve fibers that transmit impulses that activate effector cells, e.g., in muscle or gland tissue.


1. pertaining to motion.
2. a muscle, nerve or center that effects movements.

motor activity
limb movement the most obvious of these forms of activity.
motor alpha-neuron
ventral spinal cord neurons which innervate skeletal muscle. Called also final common pathway, lower motor neuron.
motor depressant anticonvulsant
a drug that depresses motor activity and hence prevents convulsions, e.g. phenobarbital sodium, phenytoin sodium.
motor dysfunction
abnormality of the motor system.
motor end-plate
sites of neuraptic transmission of acetylcholine from nerve to muscle receptors.
motor fibers
innervate the body effectors.
motor lubricating oil
ingestion may cause lead poisoning.
motor nerve conduction
the transmission of impulses along motor nerves to skeletal muscle.
motor unit
includes the motor neuron, neuromuscular junction, and the myofibrils innervated by the neuron.
motor unit action potential
the electrical activity of voluntary muscle contractions recorded by needle electromyography.
References in periodicals archive ?
Structural integrity of corticospinal motor fibers predicts motor impairment in chronic stroke.
Fibrosis occurs between motor fibers at 1 to 2 years and fragmentation and disintegration occur by 2 years.
As with any facial nerve surgery, the facial motor fibers must be handled delicately so that the remaining motor fibers function normally and do not become edematous.