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The motor endplate

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Published by R. E. Krieger in Huntington, N.Y .
Written in English

Subjects:

  • Myoneural junction.,
  • Nervous system -- Diseases.

Book details:

Edition Notes

Bibliography: p. 418-485.

Statement[by] Sumner I. Zacks.
Classifications
LC ClassificationsQP363 .Z3 1973
The Physical Object
Paginationxii, 495 p.
Number of Pages495
ID Numbers
Open LibraryOL5436131M
ISBN 100882751131
LC Control Number73084420
OCLC/WorldCa900809

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Genre/Form: Motor endplate: Additional Physical Format: Online version: Zacks, Sumner I. (Sumner Irwin), Motor endplate. Philadelphia, Saunders, Additional Physical Format: Online version: Zacks, Sumner I. Motor endplate. Huntington, N.Y., R.E. Krieger, [©] (OCoLC) Document Type. Each muscle fiber receives only one motor end plate, but the number of muscle fibers innervated by a single alpha motor neuron axon varies from a few to many. The aggregate of a motor neuron axon and all the muscle fibers it innervates is called a motor unit (Fig. ). In general, as the need for fine control of a muscle increases, the size or innervation ratio of its motor unit decreases. Motor endplate forms the postsynaptic part of NMJ. It is the thickened portion of the muscle plasma membrane (sarcolemma) that is folded to form depressions called junctional folds. The nerve terminal does not penetrate the motor endplate but fits into the junctional folds. Junctional folds have nicotinic ACh receptors concentrated at the : Sopiko Jimsheleishvili, Komal Marwaha, Andrew l. Sherman.

The motor end-plate is the connection between the motor nerve and the skeletal muscle cell. Its function is to transmit the electrical signal (= action potential) from the nerve cell to the muscle cell. This is the stimulus that will make the skeletal cell contract. Thus, MuSK—rapsyn interactions are critical in forming the local scaffold for postsynaptic components in the motor endplate [29,31]. By agreement with the publisher, this book is accessible by the search feature, but cannot be browsed. the motor axons are distributed to the appropriate skeletal muscles through peripheral nerves and synapses called neuromuscular junctions or end plates on skeletal muscle fibers. what makes up the motor unit. each motor (muscle) fascicle is paired to one motor neuron making up the motor unit . 1. ACh binds to receptors on the motor end plate 2. the resulting action potential moves down the sarcolemma 3. The action potential moves down the t-tubules 4. The action potential reaches the terminal cisternae of the SR 5. Calcium ions are released into the sarcoplasm.

fractures of the vertebral endplate You can deal effectively with fractures of the vertebral endplates by keeping fluid pumping through this fine cartilage interface between the discs and vertebrae. The vertebral endplates are the thin cartilaginous interfaces between the discs and the vertebrae above and below. A neuromuscular junction (or myoneural junction) is a chemical synapse formed by the contact between a motor neuron and a muscle fiber. It is at the neuromuscular junction that a motor neuron is able to transmit a signal to the muscle fiber, causing muscle : This is called motor unit recruitment - each motor unit is made up of the muscle cells controlled by a single neuron. This is at least the second incorrect statement by this lecturer (Raja) - another is the incorrect notion that action potentials leave the axon at one node and then re-enter at the next node. Signal transmission from nerve to muscle at the motor end plate. The neuromuscular junction is the synapse that is formed between an alpha motor neuron (α-MN) and the skeletal muscle fiber. In order for a muscle to contract, an action potential is first propagated down a nerve until it reaches the axon terminal of the motor neuron.