motoneuron$50531$ - ορισμός. Τι είναι το motoneuron$50531$
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Τι (ποιος) είναι motoneuron$50531$ - ορισμός

LARGE LOWER MOTOR NEURONS OF THE BRAINSTEM AND SPINAL CORD
Α-Motor neuron; Α-motor neuron; Α-motoneuron; Α-Motoneuron; Α-motoneurons; Alpha motoneurons; Alpha motoneuron; Alpha motor neurons; Alpha motorneuron; Α motorneuron; Α-motorneuron; A motorneuron; A-Motoneuron; A-motor neuron; A-motoneuron; A-Motor neuron; A-motorneuron; A-motoneurons; Alpha motorneurons; Alpha system; Α motor neurons; Α motoneurons; Alpha motor neurone; Α-Neuron
  • The [[corticospinal tract]] is one of the major descending pathways from the [[brain]] to the α-MNs of the [[spinal cord]].
  • Alpha motor neurons are located in lamina IX according to the [[Rexed lamina system]].
  • [[Poliomyelitis]], caused by the [[poliovirus]] seen here, is associated with the selective loss of cells within the ventral horn of the [[spinal cord]], where α-MNs are located.
  • Under the influence of the protein [[sonic hedgehog]], shown here, cells of the [[floor plate]] of the developing spinal cord differentiate into alpha motor neurons.

Gamma motor neuron         
CELL TYPE
Fusimotor neurons; Gamma neuron; Gamma motoneuron; Motor neurons, gamma; Γ-motoneurons; Gamma motoneurons; Gamma motor neurons; Γ motor neuron; Γ-motoneuron; G-motoneuron; G-motoneurons; G motor neuron; Gamma motor neurone; Gamma system
A gamma motor neuron (γ motor neuron), also called gamma motoneuron, or fusimotor neuron, is a type of lower motor neuron that takes part in the process of muscle contraction, and represents about 30% of (Aγ) fibers going to the muscle.Hunt, C.
Beta motor neuron         
CELL TYPE
Beta motoneuron; Β motor neuron; Β motoneuron; Beta motor neurons
Beta motor neurons (β motor neurons), also called beta motoneurons, are a kind of lower motor neuron, along with alpha motor neurons and gamma motor neurons. Beta motor neurons innervate intrafusal fibers of muscle spindles with collaterals to extrafusal fibers - a type of slow twitch fiber.
motor neuron         
NEURON WITH CELL BODY IN THE MOTOR CORTEX, BRAINSTEM OR THE SPINAL CORD, AND AXON CONTROLLING EFFECTOR ORGANS, MAINLY MUSCLES AND GLANDS
Motoneuron; Motor neurone; Motoneurons; Motor neurons; Motor fibers; Motor nerve cell; Motor nerves; Motor fibres; Motor development; Motor innervation; Motorneuron; Motor neurones; Lateral motor column neuron; Ventral horn cell; Visceromotor nuclei; Spinal motor nerves; Motorneurons; Motor Neuron; Motor Neurons; Motor tract
¦ noun a nerve cell forming part of a pathway along which impulses pass from the brain or spinal cord to a muscle or gland.

Βικιπαίδεια

Alpha motor neuron

Alpha (α) motor neurons (also called alpha motoneurons), are large, multipolar lower motor neurons of the brainstem and spinal cord. They innervate extrafusal muscle fibers of skeletal muscle and are directly responsible for initiating their contraction. Alpha motor neurons are distinct from gamma motor neurons, which innervate intrafusal muscle fibers of muscle spindles.

While their cell bodies are found in the central nervous system (CNS), α motor neurons are also considered part of the somatic nervous system—a branch of the peripheral nervous system (PNS)—because their axons extend into the periphery to innervate skeletal muscles.

An alpha motor neuron and the muscle fibers it innervates is a motor unit. A motor neuron pool contains the cell bodies of all the alpha motor neurons involved in contracting a single muscle.