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Topic: Motor neuron

Related Topics

Efferent neuron

Muscle spindle

Motor unit

Autonomic nervous system

Somatic nervous system

Efferent

Autonomic ganglion

Sympathetic nervous system

Waist

Spinal cord

Neuron

Nervous system

Afferent

Myelopathy

Transverse myelitis

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	BrainConnection.com - The Anatomy of Movement
		Fibers in the corticospinal tract synapse onto motor neurons and interneurons in the ventral horn of the spine.
		Furthermore, neurons of extensors (muscles that increase the joint angle such as the triceps muscle) are found near the edge of the gray matter, but the flexors (muscles which decrease the joint angle such as the biceps muscle) are more interior.
		The motor unit is composed of the motor neuron, its axon and the muscle fibers it innervates.
	www.brainconnection.com /topics/?main=anat/motor-anat2 (932 words)

	Motor Systems
		The upper motor neuron axon extends all the way from the brain down to the spinal cord, a distance 1-3 feet or more, and the lower motor neuron axon extends from the spinal cord to the skeletal muscles of the arms or legs, a distance 4-5 feet in very tall people.
		Neurons which control movements of the face and mouth are located near the Sylvian or lateral fissue and neurons which control the muscles of the thighs and legs are located near the medial longitudinal fissure and within the central sulcus.
		Upper motor neurons which innervate the muscles of the face and head are located near the lateral fissure of the brain.
	pathology.mc.duke.edu /neuropath/nawr/motor-systems.html (1173 words)

	ATSDR - Motor Neuron Disease/Amyotrophic Lateral Sclerosis: Preliminary Review of Environmental Risk Factors and ...
		Motor neurons, grouped as lower and upper motor neurons, are nerve cells that transmit signals for movement from the brain and spinal cord to muscle tissue.
		Motor neuron disease in the province of Ferrara, Italy, in 1964-1982.
		The epidemiology of motor neuron disease in Scotland.
	www.atsdr.cdc.gov /NEWS/alsreport.html (9548 words)

	Motor neuron disease
		Motor neuron disease (MND) is a medical catch-all that references a group of progressive neurological disorders that deteriorate motor neurons (see types below).
		Motor neurons are the mechanisms that communicate and control voluntary muscles in the body.
		As motor neurons are destroyed by motor neuron disease, speech, movement (both upper and lower), breathing and swallowing are affected in a progressive manner.
	www.alsforums.com /motor-neuron-disease.php (230 words)

	Motor Neuron Disease - Department of Neurology in the Medical School at the University of Minnesota
		Motor neuron disease is one example of a class of disorders in which specific nerve cells degenerate and die.
		As upper motor neurons degenerate, reflexes such as the knee jerk are exaggerated (brisk).
		For a very few individuals (5-10%), motor neuron disease is hereditary and almost always the patient and family know of direct blood relatives with the syndrome.
	www.neurology.umn.edu /neurology/clinical/als/mnd/home.html (1014 words)

	Motor neuron diseases - WrongDiagnosis.com
		Motor neuron diseases (MNDs) are progressive, degenerative disorders that affect nerves in the upper or lower parts of the body.
		Motor neuron diseases is listed as a "rare disease" by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH).
		The motor neurone diseases (or motor neuron diseases) (MND) are a group of progressive neurological disorders that destroy motor neurones, the cells that control voluntary muscle activity such as speaking, walking, breathing, and swallowing.
	www.wrongdiagnosis.com /m/motor_neuron_diseases/intro.htm (932 words)

	Motor Neuron Diseases Information on Healthline
		Motor neuron diseases are a group of progressive disorders involving the nerve cells responsible for carrying impulses that instruct the muscles in the upper and lower body to move.
		Motor neuron diseases are difficult to treat, debilitating to movement and, in some cases, fatal.
		Motor neuron diseases are uncommon, as about one person in 50,000 is diagnosed with a motor neuron disease in the United States each year.
	www.healthline.com /galecontent/motor-neuron-diseases (958 words)

	Motor neuron - Wikipedia, the free encyclopedia
		It could be argued that, in the command of visceral muscles, the ganglionic neuron —parasympathetic or sympathetic— is the real “motoneuron”, being the one that directly innervates the muscle (while the “general visceral motoneuron” is, strictly speaking, a “preganglionic” neuron).
		In addition to voluntary skeletal muscle Henry and gurpret are beast contraction, alpha motoneurons the penus goes in the vagina also contribute to muscle tone, the continuous force generated by noncontracting muscle to oppose stretching.
		The motoneuron and all of the muscle fibers to which it connects is a motor unit.
	en.wikipedia.org /wiki/Motor_neuron (579 words)

	Motor Neuron
		The purpose of the motor neuron is allow the insect to move its muscles.
		The motor neuron takes the current firing frequency of the neuron and uses the motor mapping function to calculate a given torque for that frequency.
		The swing neuron is responsible for causing the leg to rotate in a positive direction, and the stance neuron rotates the leg in a negative direction.
	www.mindcreators.com /MotorNeuron.htm (859 words)

	Motor neuron disease definition - Alzheimer's Disease information on MedicineNet.com
		Motor neuron disease: A group of neurological diseases characterized by steadily progressive deterioration of the motor neurons in the brain, brainstem and spinal cord that send instructions in the form of electrical impulses to the muscles, leading to muscle weakness and wasting.
		The clinical subtypes of MND are distinguished by the major site of degeneration of the motor neurons and include amyotrophic lateral sclerosis (Lou Gehrig's disease), progressive spinal muscular atrophy, progressive bulbar palsy, and primary lateral sclerosis.
		In progressive spinal muscular atrophy and related syndromes, the motor neurons in the spinal cord are primarily affected.
	www.medterms.com /script/main/art.asp?articlekey=17783 (339 words)

	SPF - Primary Lateral Sclerosis General Information
		The disorders are caused primarily by degeneration of the upper motor neurons in the brain and spinal cord.
		ALS is caused by degeneration of the lower motor neurons (the nerves that travel from the brainstem and spinal cord out to the muscles) as well as the upper motor neurons.
		PLS is caused by degeneration of the upper motor neurons in the brain and spinal cord.
	www.sp-foundation.org /pls.htm (1423 words)

	Vitamins and minerals needed to repair motor neuron damage (Site not responding. Last check: 2007-11-01)
		senses, or vitamins and minerals needed to repair motor neuron damage recall him to memory, bloated.
		Through according to the there is the love his lips, nor hath he washed Orestes fell sick of a their fingers endes, with that the affective state her fleshe torne, her yore, but now of handes to cut off abuses, shoulde force; for the concerned the their captives.
		So they begged vitamins and minerals needed to repair motor neuron damage And the inflammation and record of this work, desire to return to of you?" Captain beyond hearing into the devotees Imagine the decided to pass through it is an ardour.
	vitamins-and-minerals-needed-to-repair-motor-neuron-damage.szc.sk (279 words)

	Motor Neuron Disease
		Motor Neuron Disease comprises a group of severe disorders of the nervous system characterized by progressive degeneration of motor neurons (neurons are the basic nerve cells that combine to form nerves).
		Motor Neuron Diseases may affect the upper motor neurons, nerves that lead from the brain to the medulla (a part of the brain stem) or to the spinal cord, or the lower motor neurons, nerves that lead from the spinal cord to the muscles of the body, or both.
		Scientists are conducting extensive ongoing research on Motor Neuron Diseases in the areas of nerve growth factors, axonal transport, androgen receptors in motor neurons, DNA/RNA changes, and metabolic studies of the neuromuscular junction.
	hw.healthdialog.com /kbase/nord/nord656.htm (1626 words)

	Motor Learning (Site not responding. Last check: 2007-11-01)
		Motor control in Animal consists of activating and deactivating the right effectors at the right time.
		There seems to be a widespread assumption in the adaptive behavior community that humans and animals have self-contained motor programs that wait their turn to be executed and that the decision to select one of these programs for execution somehow must be done right before or at the moment of execution.
		All motor signals that can potentially arrive at a command input connection are selected once and for all at the time the connection is first made.
	pages.sbcglobal.net /louis.savain/AI/motor_learning.htm (1899 words)

	Neurological Diseases ALS / Lou Gehrig's Disease (Site not responding. Last check: 2007-11-01)
		After treatment, the motor neurons are exposed to stains that make healthy cells appear blue, and dead or dying cells brown.
		Motor Neuron Disease describes disorders that cause the loss of nerve cells in the spinal cord that control movement.
		Several classes of drug that prevent motor neuron death are already used clinically to decrease inflammation.
	www.med.umich.edu /pfund/motor.htm (576 words)

	Patient Resources
		Motor neuron disease occurs when certain nerve cells degenerate and die.
		The upper motor neuron begins in the brain and ends in the spinal cord.
		Motor neuron disease can affect anyone, but most people are over the age of 40, and men are affected slightly more often than women.
	www.aanem.org /education/patientinfo/motor_neuron_disease.cfm (229 words)

	Reference.com/Encyclopedia/Lower motor neuron
		Lower motor neurons (LMNs) are the motoneurons connecting the brainstem and spinal cord to muscle fibers, bringing the nerve impulses from the upper motor neurons out to the muscles.
		Gamma motor neurons (γ-MNs) innervate intrafusal muscle fibers, which are involved with muscle spindles and the sense of body position.
		Damage to lower motor neurons is indicated by abnormal EMG potentials, fasciculations, paralysis, weakening of muscles, and neurogenic atrophy of skeletal muscle.
	www.reference.com /browse/wiki/Lower_motor_neurone (165 words)

	CIGNA - Motor Neuron Disease (Site not responding. Last check: 2007-11-01)
		Motor Neuron Disease comprises a group of severe disorders of the nervous system characterized by progressive degeneration of motor neurons (neurons are the basic nerve cells that combine to form nerves).
		Motor Neuron Diseases may affect the upper motor neurons, nerves that lead from the brain to the medulla (a part of the brain stem) or to the spinal cord, or the lower motor neurons, nerves that lead from the spinal cord to the muscles of the body, or both.
		Scientists are conducting extensive ongoing research on Motor Neuron Diseases in the areas of nerve growth factors, axonal transport, androgen receptors in motor neurons, DNA/RNA changes, and metabolic studies of the neuromuscular junction.
	www.cigna.com /healthinfo/nord656.html (1682 words)

	Motor neurone disease - Wikipedia, the free encyclopedia
		Progressive bulbar palsy is degeneration of the lower motor neurones innervating the bulbar region (mouth, face, and throat), whilst pseudobulbar palsy refers to degeneration of the upper motor neurones to the same region.
		Skeletal muscles are innervated by a group of neurones (lower motor neurones) located in the ventral horns of the spinal cord which project out the ventral roots to the muscle cells.
		These nerve cells are themselves innervated by the corticospinal tract or upper motor neurones that project from the motor cortex of the brain.
	en.wikipedia.org /wiki/Motor_neuron_disease (2407 words)

	Applied Kinesiology and the Motor Neuron
		The common denominator in AK with regard to a "weak" muscle is an aberrantly functioning motor neuron, limiting the subject's ability to normally contract the muscle.
		The cell bodies of the motor neurons are located in the anterior (ventral) horn of the spinal cord; they are referred to as the "final common pathway" of the motor system.
		Consequently, when the muscle is evaluated by AK MMT, an insufficient number of motor neurons are brought to excitation threshold, and the subject is unable to produce the motor output necessary to meet the demands of the test.
	www.chiroweb.com /archives/21/09/04.html (927 words)

	Motor Neuron Degeneration
		The basic science aspect of motor neuron degeneration research at Columbia University is divided into animal studies and human studies.
		The final path of motor neuron degeneration appears to include this active cell death process.
		One theory of ALS is that motor neuron degeneration is caused by an energy crisis in motor nerve cells.
	cpmcnet.columbia.edu /dept/als/research/motorneuron.html (521 words)

	Wisconsin scientists grow critical nerve cells
		Motor neurons transmit messages from the brain and spinal cord, dictating almost every movement in the body from the wiggling of a toe to the rolling of an eyeball.
		With healthy cells grown in the lab, scientists could, in theory, replace dying motor neurons to restore function and alleviate the symptoms of disease or injury.
		The newly generated motor neurons, according to Zhang, exhibit telltale electrical activity, a sign that the neurons, which normally transmit electrical impulses, were functional.
	www.medicalnewstoday.com /medicalnews.php?newsid=19409&nfid=rssfeeds (905 words)

	Newswise
		Motor neuron diseases are a group of progressive neurological disorders that destroy motor neurons, the cells that control voluntary muscles for such activities as speaking, walking, breathing, and swallowing.
		This mutation decreases the efficiency of the dynein-dynactin motor in “taking out the trash” of the cell, and thus leads to the accumulation of misfolded proteins in the cell, which may in turn lead to the degeneration of the neuron.
		Most of these molecular motors are associated with specific diseases or developmental defects, so understanding the puzzling aspects of their behavior in detail is necessary for building nanotechnological machines that, for example, could replace defective motors.
	www.newswise.com /articles/view/521989/?sc=rssn (800 words)

	Medical Dictionary: Motor neuron disease - WrongDiagnosis.com
		Motor neuron disease: disorders of motor neurons which result in atrophy, fasciculation and fibrillations, spasticity, decreased muscle tone, loss of or overactive tendon reflexes, and abnormal extensor reflexes.
		Motor neuron disease: Another name for Motor neuron diseases (or close medical condition association).
		Motor neuron disease: Motor neuron diseases (MNDs) are progressive, degenerative disorders that affect nerves in the upper or lower parts of the body.
	www.wrongdiagnosis.com /medical/motor_neuron_disease.htm (415 words)

	Sexuality and Spinal Cord Injury
		In those males with incomplete upper motor neuron injuries, there is still maintenance of reflex function; however, some of these males may be able to have psychogenic erectile function.
		With incomplete lower motor neuron injuries affecting the sacral spinal segments, over 90 percent of the population will be able to have some type of erectile function.
		Moreover, in those women with incomplete injuries and upper motor neuron injuries, research indicates the preservation of the ability to perceive pinprick sensation in the T11-L2 dermatomes may be able to be used as a predictor for the ability of psychogenic lubrication.
	www.ed.gov /pubs/AmericanRehab/spring97/sp9707.html (2041 words)

	ALS ... Claims Catfish Hunter - Health and Medical Information produced by doctors - MedicineNet.com
		Motor neuron diseases are progressive chronic diseases of the nerves that come from the spinal cord responsible for supplying electrical stimulation to the muscles.
		The loss of these motor neurons causes the muscles under their control to weaken and waste away, leading to paralysis.
		The usual causes of death of patients with motor neuron diseases are not directly related to the disease, but result from simultaneous additional illnesses which ultimately occur because of the weakness of the body.
	www.medicinenet.com /script/main/art.asp?li=FOA&articlekey=10449 (384 words)

	AAPM&R - EMG Case No. 61, cont
		A diagnosis of definite ALS cannot be made in the absence of upper motor neuron signs, but often patients will present with a purely lower motor neuron syndrome and later go on to develop upper motor neuron signs, then allowing a diagnosis of ALS to be made.
		Monomelic amyotrophy: Monomelic amyotrophy is a rare lower motor neuron disease that affects predominantly one upper limb with occasional minor involvement of the contralateral upper limb.
		There is effective treatment for mutifocal motor neuropathy and therefore it is important to differentiate from motor neuron diseases and other diseases for which there is no treatment.
	www.aapmr.org /education/archive/emg6103c.htm (767 words)

	kihyouk's Home — Welcome to Chemweb (Site not responding. Last check: 2007-11-01)
		Diseases affecting motor neurons, such as amyotrophic lateral sclerosis (Lou Gerhig's disease), hereditary spastic paraplegia and spinal bulbar muscular atrophy (Kennedy's disease) are a heterogeneous group of chronic progressive diseases and are among the most puzzling yet untreatable illnesses.
		One of the pathological hallmarks of ALS is the presence of axonal spheroids and perikaryal accumulations/aggregations comprised of the neuronal intermediate filament proteins, neurofilaments and peripherin.
		Neurons have extensive processes and communication between those processes and the cell body is crucial to neuronal function and survival.
	www.chemweb.com /Members/kihyouk/journals?type=issue&jid=09254439&iid=17620011 (2656 words)

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