Specializing in Canine and Feline Neurology and Neurosurgery for Over 30 Years

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motor neuron

A nerve cell that conducts action potentials away from the central nervous system and innervates effector organs (muscle and glands); it forms the ventral roots of the spinal nerves; also called an efferent neuron or motoneuron.

Related Words

action potential ; central nervous system (CNS) ; efferent ; innervation ; motoneuron ; nerve ; nerve root ; ventral


motor unit

Composed of the motor neuronaxon → muscle fibers. 

Related Words

axon  ;  fiber  ;  motor neuron

muscular dystrophy

A group of congenital muscle diseases in which muscle fibers are unusually susceptible to damage and become progressively weaker.  The most common types of muscular dystrophies are due to a genetic deficiency of the muscle protein dystrophin.

Related Words

congenital  ;  disease  ;  fiber

myalgia

Muscle pain.

 


myasthenia gravis

An autoimmune disease that affects the neuromuscular junction, interrupting the communication between nerve and muscle, thereby causing muscle weakness.

 
Related Words
 

myelin

The lipid substance coating the axons of certain neurons; formed by neuroglial cells: oligodendrocytes and Schwann cells; enables action potentials to travel faster while using less energy.

 

Related Words

action potential ; axon ; neuralgia ; neuron ; oligodendrocytes ; Schwann cell


myelitis

Inflammation of the spinal cord.

Related Words
inflammation  ;  spinal cord

myelography

Diagnostic procedure in which contrast material is injected into the spinal subarachnoid space allowing visualization of the spinal cord and nerve roots.  

 
Related Words
 

myelopathy

Any disease affecting the spinal cord.

Related Words
disease  ;  spinal cord


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