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Neuromuscular junction

Index Neuromuscular junction

A neuromuscular junction (or myoneural junction) is a chemical synapse formed by the contact between a motor neuron and a muscle fiber. [1]

134 relations: Acetyl-CoA, Acetylcholine, Acetylcholinesterase, Acetyltransferase, Action potential, Agrin, Alpha-Bungarotoxin, Amifampridine, Amino acid, Amplitude, Antibody, Apnea, Arthrogryposis, Atrophy, Autoimmune disease, Autoimmunity, Azathioprine, B cell, Basal lamina, Botulinum toxin, Cell cycle, Cell membrane, Chemical synapse, Choline, Cholinergic, Cholinesterase, Clostridium tetani, Conformational change, Congenital myasthenic syndrome, Constipation, Cooperative binding, Creatine kinase, Cysteine, Cytoplasm, Cytosol, Degeneration (medical), Density, Depolarization, Disease, Disulfide, Dok-7, Dominance (genetics), Dorsal root ganglion, Dry eye syndrome, Duchenne muscular dystrophy, Dysautonomia, Dystrophin, Electron microscope, Embryonic stem cell, Endocytosis, ..., Erectile dysfunction, Eukaryote, Excitatory postsynaptic potential, Exocytosis, Fertility, Fetus, Flaccid paralysis, Gait, Genetic disorder, Gestation, Glutamic acid, Green fluorescent protein, Gynecomastia, Heredity, Horseradish peroxidase, Humoral immunity, Hypertrophy, Hypokinesia, Hyporeflexia, Hypotonia, Immunoglobulin G, Invagination, Invertebrate, Ion, Ion channel, Lambert–Eaton myasthenic syndrome, Latrotoxin, Ligand, Ligand (biochemistry), Ligand-gated ion channel, Low-density lipoprotein, Many-banded krait, Medulla oblongata, Mitochondrion, Motor neuron, Muscle contraction, Muscle tone, MuSK protein, Mutation, Myasthenia gravis, Myocyte, Myopathy, Neoplasm, Neuroeffector junction, Neuromuscular-blocking drug, Neuromyotonia, Neurotransmitter, Nicotinic acetylcholine receptor, Ophthalmoparesis, Optogenetics, Paralysis, Pathogen, Peripheral neuropathy, Perspiration, Phosphate, Phospholipase C, Placenta, Prednisone, Principles of Neural Science, Prokaryote, Proteoglycan, RAPSN, Receptor tyrosine kinase, Sarcolemma, Shortness of breath, Skeletal muscle, Small-cell carcinoma, SNARE (protein), Spasticity, Spinal and bulbar muscular atrophy, Synapse, Synaptic vesicle, Synaptotagmin 1, Taipoxin, Testosterone, Tetanospasmin, Transgene, Tyrosine, Tyrosine kinase, Vertebrate, Voltage-gated calcium channel, Voltage-gated potassium channel, X chromosome, Xerostomia. Expand index (84 more) »

Acetyl-CoA

Acetyl-CoA (acetyl coenzyme A) is a molecule that participates in many biochemical reactions in protein, carbohydrate and lipid metabolism.

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Acetylcholine

Acetylcholine (ACh) is an organic chemical that functions in the brain and body of many types of animals, including humans, as a neurotransmitter—a chemical message released by nerve cells to send signals to other cells.

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Acetylcholinesterase

Acetylcholinesterase, encoded by HGNC gene ACHE; EC 3.1.1.7) is the primary cholinesterase in the body. It is an enzyme that catalyzes the breakdown of acetylcholine and of some other choline esters that function as neurotransmitters. AChE is found at mainly neuromuscular junctions and in chemical synapses of the cholinergic type, where its activity serves to terminate synaptic transmission. It belongs to carboxylesterase family of enzymes. It is the primary target of inhibition by organophosphorus compounds such as nerve agents and pesticides.

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Acetyltransferase

Acetyltransferase (or transacetylase) is a type of transferase enzyme that transfers an acetyl group.

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Action potential

In physiology, an action potential occurs when the membrane potential of a specific axon location rapidly rises and falls: this depolarisation then causes adjacent locations to similarly depolarise.

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Agrin

Agrin is a large proteoglycan whose best-characterised role is in the development of the neuromuscular junction during embryogenesis.

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Alpha-Bungarotoxin

α-Bungarotoxin (α-BTX) is one of the bungarotoxins, components of the venom of the elapid Taiwanese banded krait snake (Bungarus multicinctus).

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Amifampridine

Amifampridine (pyridine-3,4-diamine, 3,4-diaminopyridine, 3,4-DAP) is used as a drug, predominantly in the treatment of a number of rare muscle diseases. The free base form of the drug has been used to treat congenital myasthenic syndromes and Lambert–Eaton myasthenic syndrome (LEMS) through compassionate use programs since the 1990s and was recommended as a first line treatment for LEMS in 2006, using ad hoc forms of the drug, since there was no marketed form. Around 2000 doctors at Assistance Publique – Hôpitaux de Paris created a phosphate salt form, which was developed through a series of companies ending with BioMarin Pharmaceutical which obtained European approval in 2009 under the trade name Firdapse, and which licensed the US rights to Catalyst Pharmaceuticals in 2012. As of January 2017, Catalyst and another US company, Jacobus Pharmaceuticals, which had been manufacturing the free base form and giving it away for free since the 1990s, were racing to obtain FDA approval for their versions first; the company that obtained the approval would have seven years of marketing exclusivity. Amifampridine phosphate has orphan drug status in the EU for Lambert–Eaton myasthenic syndrome and Catalyst holds both an orphan designation and a breakthrough therapy designation in the US..

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Amino acid

Amino acids are organic compounds containing amine (-NH2) and carboxyl (-COOH) functional groups, along with a side chain (R group) specific to each amino acid.

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Amplitude

The amplitude of a periodic variable is a measure of its change over a single period (such as time or spatial period).

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Antibody

An antibody (Ab), also known as an immunoglobulin (Ig), is a large, Y-shaped protein produced mainly by plasma cells that is used by the immune system to neutralize pathogens such as pathogenic bacteria and viruses.

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Apnea

Apnea or apnoea is suspension of breathing.

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Arthrogryposis

Arthrogryposis multiplex congenital (AMC), or simply arthrogryposis, describes congenital joint contracture in two or more areas of the body.

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Atrophy

Atrophy is the partial or complete wasting away of a part of the body.

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Autoimmune disease

An autoimmune disease is a condition arising from an abnormal immune response to a normal body part.

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Autoimmunity

Autoimmunity is the system of immune responses of an organism against its own healthy cells and tissues.

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Azathioprine

Azathioprine (AZA), sold under the brand name Imuran among others, is an immunosuppressive medication.

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B cell

B cells, also known as B lymphocytes, are a type of white blood cell of the lymphocyte subtype.

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Basal lamina

The basal lamina is a layer of extracellular matrix secreted by the epithelial cells, on which the epithelium sits.

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Botulinum toxin

Botulinum toxin (BTX) or Botox is a neurotoxic protein produced by the bacterium Clostridium botulinum and related species.

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Cell cycle

The cell cycle or cell-division cycle is the series of events that take place in a cell leading to its division and duplication of its DNA (DNA replication) to produce two daughter cells.

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Cell membrane

The cell membrane (also known as the plasma membrane or cytoplasmic membrane, and historically referred to as the plasmalemma) is a biological membrane that separates the interior of all cells from the outside environment (the extracellular space).

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Chemical synapse

Chemical synapses are biological junctions through which neurons' signals can be exchanged to each other and to non-neuronal cells such as those in muscles or glands.

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Choline

Choline is a water-soluble vitamin-like essential nutrient.

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Cholinergic

In general, the word choline refers to the various quaternary ammonium salts containing the ''N'',''N'',''N''-trimethylethanolammonium cation.

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Cholinesterase

In biochemistry, a cholinesterase or choline esterase is an esterase that lyses choline-based esters, several of which serve as neurotransmitters.

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Clostridium tetani

Clostridium tetani is a rod-shaped, anaerobic species of pathogenic bacteria, of the genus Clostridium.

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Conformational change

In biochemistry, a conformational change is a change in the shape of a macromolecule, often induced by environmental factors.

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Congenital myasthenic syndrome

Congenital myasthenic syndrome (CMS) is an inherited neuromuscular disorder caused by defects of several types at the neuromuscular junction.

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Constipation

Constipation refers to bowel movements that are infrequent or hard to pass.

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Cooperative binding

Molecular binding is an interaction between molecules that results in a stable physical association between those molecules.

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Creatine kinase

Creatine kinase (CK), also known as creatine phosphokinase (CPK) or phosphocreatine kinase, is an enzyme expressed by various tissues and cell types.

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Cysteine

Cysteine (symbol Cys or C) is a semi-essential proteinogenic amino acid with the formula HO2CCH(NH2)CH2SH.

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Cytoplasm

In cell biology, the cytoplasm is the material within a living cell, excluding the cell nucleus.

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Cytosol

The cytosol, also known as intracellular fluid (ICF) or cytoplasmic matrix, is the liquid found inside cells.

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Degeneration (medical)

Degeneration is deterioration in the medical sense.

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Density

The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume.

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Depolarization

In biology, depolarization is a change within a cell, during which the cell undergoes a shift in electric charge distribution, resulting in less negative charge inside the cell.

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Disease

A disease is any condition which results in the disorder of a structure or function in an organism that is not due to any external injury.

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Disulfide

In chemistry, a disulfide refers to a functional group with the structure R−S−S−R′.

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Dok-7

Dok-7 is a non-catalytic cytoplasmic adaptor protein that is expressed specifically in muscle and is essential for the formation of neuromuscular synapses.

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Dominance (genetics)

Dominance in genetics is a relationship between alleles of one gene, in which the effect on phenotype of one allele masks the contribution of a second allele at the same locus.

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Dorsal root ganglion

A dorsal root ganglion (or spinal ganglion) (also known as a posterior root ganglion), is a cluster of neurons (a ganglion) in a dorsal root of a spinal nerve.

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Dry eye syndrome

Dry eye syndrome (DES), also known as keratoconjunctivitis sicca (KCS), is the condition of having dry eyes.

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Duchenne muscular dystrophy

Duchenne muscular dystrophy (DMD) is a severe type of muscular dystrophy.

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Dysautonomia

Dysautonomia or autonomic dysfunction is a condition in which the autonomic nervous system (ANS) does not work properly.

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Dystrophin

Dystrophin is a rod-shaped cytoplasmic protein, and a vital part of a protein complex that connects the cytoskeleton of a muscle fiber to the surrounding extracellular matrix through the cell membrane.

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Electron microscope

An electron microscope is a microscope that uses a beam of accelerated electrons as a source of illumination.

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Embryonic stem cell

Embryonic stem cells (ES cells or ESCs) are pluripotent stem cells derived from the inner cell mass of a blastocyst, an early-stage pre-implantation embryo.

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Endocytosis

Endocytosis is a form of bulk transport in which a cell transports molecules (such as proteins) into the cell (endo- + cytosis) by engulfing them in an energy-using process.

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Erectile dysfunction

Erectile dysfunction (ED), also known as impotence, is a type of sexual dysfunction characterized by the inability to develop or maintain an erection of the penis during sexual activity.

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Eukaryote

Eukaryotes are organisms whose cells have a nucleus enclosed within membranes, unlike Prokaryotes (Bacteria and other Archaea).

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Excitatory postsynaptic potential

In neuroscience, an excitatory postsynaptic potential (EPSP) is a postsynaptic potential that makes the postsynaptic neuron more likely to fire an action potential.

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Exocytosis

Exocytosis is a form of active transport in which a cell transports molecules (e.g., neurotransmitters and proteins) out of the cell (exo- + cytosis) by expelling them through an energy-dependent process.

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Fertility

Fertility is the natural capability to produce offspring.

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Fetus

A fetus is a stage in the prenatal development of viviparous organisms.

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Flaccid paralysis

Flaccid paralysis is an illness characterized by weakness or paralysis and reduced muscle tone without other obvious cause (e.g., trauma).

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Gait

Gait is the pattern of movement of the limbs of animals, including humans, during locomotion over a solid substrate.

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Genetic disorder

A genetic disorder is a genetic problem caused by one or more abnormalities in the genome.

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Gestation

Gestation is the carrying of an embryo or fetus inside viviparous animals.

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Glutamic acid

Glutamic acid (symbol Glu or E) is an α-amino acid with formula.

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Green fluorescent protein

The green fluorescent protein (GFP) is a protein composed of 238 amino acid residues (26.9 kDa) that exhibits bright green fluorescence when exposed to light in the blue to ultraviolet range.

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Gynecomastia

Gynecomastia is an endocrine system disorder in which a noncancerous increase in the size of male breast tissue occurs.

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Heredity

Heredity is the passing on of traits from parents to their offspring, either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information of their parents.

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Horseradish peroxidase

The enzyme horseradish peroxidase (HRP), found in the roots of horseradish, is used extensively in biochemistry applications.

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Humoral immunity

Humoral immunity or humoural immunity is the aspect of immunity that is mediated by macromolecules found in extracellular fluids such as secreted antibodies, complement proteins, and certain antimicrobial peptides.

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Hypertrophy

Hypertrophy (from Greek ὑπέρ "excess" + τροφή "nourishment") is the increase in the volume of an organ or tissue due to the enlargement of its component cells.

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Hypokinesia

Hypokinesia refers to decreased bodily movement.

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Hyporeflexia

Hyporeflexia refers to below normal or absent reflexes (areflexia).

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Hypotonia

Hypotonia, commonly known as floppy baby syndrome, is a state of low muscle tone (the amount of tension or resistance to stretch in a muscle), often involving reduced muscle strength.

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Immunoglobulin G

Immunoglobulin G (IgG) is a type of antibody.

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Invagination

In developmental biology, invagination is a mechanism that takes place during gastrulation.

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Invertebrate

Invertebrates are animals that neither possess nor develop a vertebral column (commonly known as a backbone or spine), derived from the notochord.

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Ion

An ion is an atom or molecule that has a non-zero net electrical charge (its total number of electrons is not equal to its total number of protons).

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Ion channel

Ion channels are pore-forming membrane proteins that allow ions to pass through the channel pore.

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Lambert–Eaton myasthenic syndrome

Lambert–Eaton myasthenic syndrome (LEMS) is a rare autoimmune disorder characterized by muscle weakness of the limbs.

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Latrotoxin

A latrotoxin is a high-molecular mass neurotoxin found in the venom of spiders of the genus Latrodectus (widow spiders).

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Ligand

In coordination chemistry, a ligand is an ion or molecule (functional group) that binds to a central metal atom to form a coordination complex.

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Ligand (biochemistry)

In biochemistry and pharmacology, a ligand is a substance that forms a complex with a biomolecule to serve a biological purpose.

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Ligand-gated ion channel

Ligand-gated ion channels (LICs, LGIC), also commonly referred as ionotropic receptors, are a group of transmembrane ion-channel proteins which open to allow ions such as Na+, K+, Ca2+, and/or Cl− to pass through the membrane in response to the binding of a chemical messenger (i.e. a ligand), such as a neurotransmitter.

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Low-density lipoprotein

Low-density lipoprotein (LDL) is one of the five major groups of lipoprotein which transport all fat molecules around the body in the extracellular water.

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Many-banded krait

The many-banded krait (Bungarus multicinctus), also known as the Taiwanese krait or the Chinese krait, is a highly venomous species of elapid snake found in much of central and southern China and Southeast Asia.

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Medulla oblongata

The medulla oblongata (or medulla) is located in the brainstem, anterior and partially inferior to the cerebellum.

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Mitochondrion

The mitochondrion (plural mitochondria) is a double-membrane-bound organelle found in most eukaryotic organisms.

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Motor neuron

A motor neuron (or motoneuron) 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.

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Muscle contraction

Muscle contraction is the activation of tension-generating sites within muscle fibers.

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Muscle tone

In physiology, medicine, and anatomy, muscle tone (residual muscle tension or tonus) is the continuous and passive partial contraction of the muscles, or the muscle's resistance to passive stretch during resting state.

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MuSK protein

MuSK (for Muscle-Specific Kinase) is a receptor tyrosine kinase required for the formation and maintenance of the neuromuscular junction.

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Mutation

In biology, a mutation is the permanent alteration of the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA or other genetic elements.

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Myasthenia gravis

Myasthenia gravis (MG) is a long-term neuromuscular disease that leads to varying degrees of skeletal muscle weakness.

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Myocyte

A myocyte (also known as a muscle cell) is the type of cell found in muscle tissue.

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Myopathy

Myopathy is a disease of the muscle in which the muscle fibers do not function properly.

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Neoplasm

Neoplasia is a type of abnormal and excessive growth of tissue.

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Neuroeffector junction

A neuroeffector junction is a site where a motor neuron releases a neurotransmitter to affect a target—non-neuronal—cell.

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Neuromuscular-blocking drug

Neuromuscular-blocking drugs block neuromuscular transmission at the neuromuscular junction, causing paralysis of the affected skeletal muscles.

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Neuromyotonia

Neuromyotonia (NMT) is a form of peripheral nerve hyperexcitability that causes spontaneous muscular activity resulting from repetitive motor unit action potentials of peripheral origin.

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Neurotransmitter

Neurotransmitters are endogenous chemicals that enable neurotransmission.

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Nicotinic acetylcholine receptor

Nicotinic acetylcholine receptors, or nAChRs, are receptor proteins that respond to the neurotransmitter acetylcholine.

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Ophthalmoparesis

Ophthalmoparesis or ophthalmoplegia refers to weakness (-paresis) or paralysis (-plegia) of one or more extraocular muscles which are responsible for eye movements.

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Optogenetics

Optogenetics is a biological technique which involves the use of light to control cells in living tissue, typically neurons, that have been genetically modified to express light-sensitive ion channels.

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Paralysis

Paralysis is a loss of muscle function for one or more muscles.

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Pathogen

In biology, a pathogen (πάθος pathos "suffering, passion" and -γενής -genēs "producer of") or a '''germ''' in the oldest and broadest sense is anything that can produce disease; the term came into use in the 1880s.

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Peripheral neuropathy

Peripheral neuropathy (PN) is damage to or disease affecting nerves, which may impair sensation, movement, gland or organ function, or other aspects of health, depending on the type of nerve affected.

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Perspiration

Perspiration, also known as sweating, is the production of fluids secreted by the sweat glands in the skin of mammals.

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Phosphate

A phosphate is chemical derivative of phosphoric acid.

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Phospholipase C

Phospholipase C (PLC) is a class of membrane-associated enzymes that cleave phospholipids just before the phosphate group (see figure).

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Placenta

The placenta is an organ that connects the developing fetus to the uterine wall to allow nutrient uptake, thermo-regulation, waste elimination, and gas exchange via the mother's blood supply; to fight against internal infection; and to produce hormones which support pregnancy.

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Prednisone

Prednisone is a synthetic glucocorticoid drug that is mostly used to suppress the immune system.

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Principles of Neural Science

First published in 1981 by Elsevier, Principles of Neural Science is an influential neuroscience textbook edited by Eric R. Kandel, James H. Schwartz, and Thomas M. Jessell.

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Prokaryote

A prokaryote is a unicellular organism that lacks a membrane-bound nucleus, mitochondria, or any other membrane-bound organelle.

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Proteoglycan

Proteoglycans are proteins that are heavily glycosylated.

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RAPSN

43 kDa receptor-associated protein of the synapse (rapsyn) is a protein that in humans is encoded by the RAPSN gene.

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Receptor tyrosine kinase

Receptor tyrosine kinases (RTKs) are the high-affinity cell surface receptors for many polypeptide growth factors, cytokines, and hormones.

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Sarcolemma

The sarcolemma (sarco (from sarx) from Greek; flesh, and lemma from Greek; sheath) also called the myolemma, is the cell membrane of a striated muscle fiber cell.

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Shortness of breath

Shortness of breath, also known as dyspnea, is the feeling that one cannot breathe well enough.

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Skeletal muscle

Skeletal muscle is one of three major muscle types, the others being cardiac muscle and smooth muscle.

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Small-cell carcinoma

Small-cell carcinoma (also known as "small-cell lung cancer", or "oat-cell carcinoma") is a type of highly malignant cancer that most commonly arises within the lung, although it can occasionally arise in other body sites, such as the cervix, prostate, and gastrointestinal tract.

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SNARE (protein)

SNARE proteins (an acronym derived from "SNAP (Soluble NSF(N-ethylmaleimide-sensitive factor) Attachment Protein) REceptor)" are a large protein complex consisting of at least 24 members in yeasts and more than 60 members in mammalian cells.

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Spasticity

Spasticity is a feature of altered skeletal muscle performance with a combination of paralysis, increased tendon reflex activity, and hypertonia.

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Spinal and bulbar muscular atrophy

Spinal and bulbar muscular atrophy (SBMA), popularly known as Kennedy's disease, is a progressive debilitating neurodegenerative disorder resulting in muscle cramps and progressive weakness due to degeneration of motor neurons in the brainstem and spinal cord.

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Synapse

In the nervous system, a synapse is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron or to the target efferent cell.

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Synaptic vesicle

In a neuron, synaptic vesicles (or neurotransmitter vesicles) store various neurotransmitters that are released at the synapse.

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Synaptotagmin 1

Synaptotagmin 1 (or synaptotagmin) is a Ca2+ sensor in the membrane of the pre-synaptic axon terminal, coded by gene SYT1 (previously SYT) at 12q21.2 (MIM:185605).

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Taipoxin

Taipoxin is a potent myo- and neurotoxin, which was isolated from the venom of the coastal taipan Oxyuranus scutellatus or also known as the common taipan.

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Testosterone

Testosterone is the primary male sex hormone and an anabolic steroid.

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Tetanospasmin

Tetanus toxin is an extremely potent neurotoxin produced by the vegetative cell of Clostridium tetani in anaerobic conditions, causing tetanus.

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Transgene

A transgene is a gene or genetic material that has been transferred naturally, or by any of a number of genetic engineering techniques from one organism to another.

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Tyrosine

Tyrosine (symbol Tyr or Y) or 4-hydroxyphenylalanine is one of the 20 standard amino acids that are used by cells to synthesize proteins.

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Tyrosine kinase

A tyrosine kinase is an enzyme that can transfer a phosphate group from ATP to a protein in a cell.

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Vertebrate

Vertebrates comprise all species of animals within the subphylum Vertebrata (chordates with backbones).

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Voltage-gated calcium channel

Voltage-gated calcium channels (VGCCs), also known as voltage-dependent calcium channels (VDCCs), are a group of voltage-gated ion channels found in the membrane of excitable cells (e.g., muscle, glial cells, neurons, etc.) with a permeability to the calcium ion Ca2+.

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Voltage-gated potassium channel

Voltage-gated potassium channels (VGKCs) are transmembrane channels specific for potassium and sensitive to voltage changes in the cell's membrane potential.

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X chromosome

The X chromosome is one of the two sex-determining chromosomes (allosomes) in many organisms, including mammals (the other is the Y chromosome), and is found in both males and females.

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Xerostomia

Xerostomia, also known as dry mouth and dry mouth syndrome, is dryness in the mouth, which may be associated with a change in the composition of saliva, or reduced salivary flow, or have no identifiable cause.

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Redirects here:

Bromage score, End plate, Motor end organ, Motor end plate, Motor end-plate, Motor endplate, Muscular block, Myoneural, Myoneural junction, NMJ, Nerve-Muscle Interface, Neuromuscular, Neuromuscular Junction, Neuromuscular agents, Neuromuscular block, Neuromuscular junction diseases, Neuromuscular junctions, Neuromuscular plate, Neuromuscular synapse, Neuromuscular transmission, Nueromuscular junction, Skeletal muscle junction.

References

[1] https://en.wikipedia.org/wiki/Neuromuscular_junction

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