Definitions for motor neuron
mo·tor neu·ron

Princeton's WordNetRate this definition:0.0 / 0 votes

1. motor neuron, efferent neuron, motor nerve fiber, motoneuronnoun

   a neuron conducting impulses outwards from the brain or spinal cord

WiktionaryRate this definition:0.0 / 0 votes

1. motor neuronnoun

   A neuron located in the central nervous system that projects its axon outside the CNS and directly or indirectly control muscles.

WikipediaRate this definition:0.0 / 0 votes

1. Motor neuron

   A motor neuron (or motoneuron or efferent neuron) is a neuron whose cell body is located in the motor cortex, brainstem or the spinal cord, and whose axon (fiber) projects to the spinal cord or outside of the spinal cord to directly or indirectly control effector organs, mainly muscles and glands. There are two types of motor neuron – upper motor neurons and lower motor neurons. Axons from upper motor neurons synapse onto interneurons in the spinal cord and occasionally directly onto lower motor neurons. The axons from the lower motor neurons are efferent nerve fibers that carry signals from the spinal cord to the effectors. Types of lower motor neurons are alpha motor neurons, beta motor neurons, and gamma motor neurons. A single motor neuron may innervate many muscle fibres and a muscle fibre can undergo many action potentials in the time taken for a single muscle twitch. Innervation takes place at a neuromuscular junction and twitches can become superimposed as a result of summation or a tetanic contraction. Individual twitches can become indistinguishable, and tension rises smoothly eventually reaching a plateau.

ChatGPTRate this definition:0.0 / 0 votes

1. motor neuron

   A motor neuron is a type of nerve cell that is responsible for sending signals from the central nervous system to the muscles and glands in the body, thus controlling movement and actions. They are part of the efferent division of the peripheral nervous system, which is involved in the transmission of signals from the brain and spinal cord to effectors - the parts of the body, such as muscles and glands, that respond to nerve signals.

WikidataRate this definition:5.0 / 1 vote

1. Motor neuron

   In neurology, the term motor neuron classically applies to neurons located in the central nervous system that project their axons outside the CNS and directly or indirectly control muscles. The motor neuron is often associated with efferent neuron, primary neuron, or alpha motor neurons. Motor neurones are neurones that carry signals from the spinal cord to the muscles to produce movement. A single motor neuron may innervate many muscle fibres, and a muscle fibre can undergo many action potentials in the time taken for a single muscle twitch. As a result, if an action potential arrives before a twitch has completed, the twitches can superimpose on one another, either through summation or tetanus. In summation, the muscle is stimulated repetitively such that additional action potentials coming from the somatic nervous system arrive before the end of the twitch. The twitches thus superimpose on one another, leading to a force greater than that of a single twitch. On the other hand, tetanus is caused by constant, very high frequency stimulation - the action potentials come at such a rapid rate that individual twitches are indistinguishable, and tension rises smoothly eventually reaching a plateau.

Editors ContributionRate this definition:0.0 / 0 votes

1. motor neuron

   A type of neuron.

   Motor Neurons conduct signals in the human body.

   
   

   Submitted by MaryC on December 26, 2020  

Matched Categories

1. • Nerve Cell

How to pronounce motor neuron?

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How to say motor neuron in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of motor neuron in Chaldean Numerology is: 9

2. Pythagorean Numerology

   The numerical value of motor neuron in Pythagorean Numerology is: 6

Examples of motor neuron in a Sentence

1. Olga Santiago:

   It's critical to diagnose early and to begin treatment as early as possible to stop the irreversible motor neuron loss, and make the achievement of motor milestones such as crawling, sitting and walking possible.

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=motor neuron
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Motor_Neuron
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Motor_Neuron
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=motor neuron