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Topic: Motor nerve

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	NERVE - LoveToKnow Article on NERVE (Site not responding. Last check: 2007-10-08)
		The optic nerve passes through the optic foramen in the skull into the orbit, where it is penetrated by the central artery of the retina, and eventually pierces the scelerotic just internal to the posterior pole of the eyeball.
		The nerve is attached to the spinal cord by two roots, of which the ventral is purely efferent or motor and the dorsal purely afferent or sensory.
		The anterior tibial nerve is chiefly muscular, innervating the muscles in front of the tibia and fibula as well as the extensor brevis digitorum pedis on the dorsum of the foot, though it gives one small cutaneous branch to the cleft between the first and second toes.
	66.1911encyclopedia.org /N/NE/NERVE.htm (4960 words)

	AANS.org \| Education and Meetings \| AANS Scientific Journals \| Neurosurgical Focus
		A biopsy specimen of the motor nerve to the gracilis muscle was obtained in 151 patients to aid in the diagnosis of neuromuscular disorders.
		Biopsy of the motor nerve of the gracilis muscle is indicated in neuromuscular diseases that affect the thigh adductor musculature.
		The motor nerve of the gracilis is seen to proceed from proximal--lateral to distal--medial at approximately a 45° angle to the long axis of the limb.
	www.aans.org /education/journal/neurosurgical/dec96/1-6-cp.asp (1379 words)

	Orthopaedic Journal 1999 (Site not responding. Last check: 2007-10-08)
		This motor axon and the muscle fibers it supplies is considered the motor unit, an important structural unit in EMG studies and in understanding recovery from nerve injury.
		The CMAP represents a summation of motor unit responses beneath the recording electrode and its amplitude is proportional to the number of motor axons stimulated.
		When the nerve is transected, whether the surgery is a primary or a delayed repair, the decision to use a nerve graft or to reanastomose the proximal and distal stumps is determined by the width of the gap and the status of the nerve stumps.
	www.uphs.upenn.edu /ortho/oj/1999/html/oj12sp99p45.html (3796 words)

	THE MERCK MANUAL, Sec. 14, Ch. 183, Disorders Of The Peripheral Nervous System
		The efferent motor fibers originate as anterior horn cells in the gray matter of the cord; the cell bodies of the afferent sensory fibers lie in dorsal root ganglia.
		The term peripheral nerve is often used to indicate the portion of a spinal nerve distal to the root and plexus.
		In some disorders, the upper motor neurons from the motor cortex to the brain stem (corticobulbar tracts) or spinal cord (corticospinal tracts) are also involved; in others (bulbar palsies), cranial nerve motor nuclei in the brain stem (bulbar nuclei) are selectively affected.
	www.merck.com /mrkshared/mmanual/section14/chapter183/183a.jsp (647 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		The peripheral spinal nerve is formed by the confluence of the dorsal and the ventral spinal roots near the spinal column.
		To estimate conduction velocity over the region of the nerve from C to A, one could simply divide the distance along the nerve from C to A by the time that it took from the onset of stimulation for the response to appear at A. This is exactly the way in which SNCV is estimated.
		In this example the nerve was the peroneal nerve, which was stimulated at the level of the fibular head (proximal) and at the level of the tarsus (distal).
	cal.vet.upenn.edu /saortho/appendix_d/appd.htm (5290 words)

	EMG & Nerve Conductions \| Electronic EMG Manual : Findings in certain disease entities
		Changes in motor nerve conductions begin with a decrease in the amplitude of the motor response, due to the loss of axons, then prolongation of latency, and a tendency to slowed motor conduction velocities as a result of the loss of the fastest conducting fibers.
		In motor radiculopathies, nerve conduction studies may reveal low motor amplitudes, in the appropriate areas, and slowed conduction velocity if the axonal loss is severe.
		In routine nerve conduction testing, we only test the median and ulnar motor response in the arm; therefore only C8 and T1 radiculopathies would be picked up unless special studies to the radial nerve or the brachial plexus are performed.
	www.teleemg.com /new/jbr090.htm (1248 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		Transposition of nerve trunks may help to restore activity to denervated musculoskeletal areas.(31,49,79,98) Direct implantation of nerve stumps into muscle tissue resulted in return of motor function.(109,111) Both of these topics are current areas of research in the quest for answers to questions related to basic biology and clinical restoration of peripheral nerve function.
		Motor cells of the ventral horn of the spinal cord are of the multipolar variety.
		Nerve stumps may be stretched to a limited extent to attain apposition, with surgical factors being course of the nerve, vascular supply, and species.
	cal.vet.upenn.edu /saortho/chapter_65/65mast.htm (17844 words)

	Nerve conduction studies
		This is normally studied in two ways in the motor nerve; by comparing CMAP at distal and proximal stimulation and by the assessment of the F-wave frequency.
		As in GBS, the pathological hallmark of the CIDP is inflammatory demyelination of root and peripheral nerves.
		In motor neuron disease, the motor and sensory nerve conduction velocities are normal in preserved axons.
	www.med.ege.edu.tr /~norolbil/2000/NBD10900.html (6684 words)

	AAPM&R - November 1996 EMG Case (Site not responding. Last check: 2007-10-08)
		Since the distribution of weakness is limited to the right ulnar nerve territory, ulnar motor and sensory conduction studies are performed to evaluate the various branches of the ulnar nerve that supply the hand.
		Nerve conduction response from the FDI with stimulation of the ulnar nerve is absent.
		Within the canal the ulnar nerve branches into: 1) a superficial branch supplying sensation to the palmar aspect of the fifth and medial fourth digits, 2) a motor branch to the hypothenar muscles, and 3) a deep motor branch to innervate the interossei, two lumbricals, and other ulnar innervated hand muscles.
	www.aapmr.org /education/archive/emg9611c.htm (705 words)

	BRAINSTEM NUCLEI
		Overall, sensory nerve nuclei tend to be located in the lateral brainstem, while motor nuclei tend to be located medially.
		Nerves III, IV, and VI are pure motor nerves that innervate the extrinsic eye muscles.
		Evidence of nerve damage could mean a peripheral lesion in the nerve, or a central lesion in the brainstem.
	thalamus.wustl.edu /course/brstem.html (1859 words)

	NGC - NGC Summary
		Multifocal motor neuropathy is a disease of lower motor neurons in adults that produces asymmetrical muscle weakness, often in association with fasciculations and cramping.
		The diagnosis of multifocal motor neuropathy is a difficult one.
		Normal sensory nerve conduction velocity across the same segments with demonstrated motor conduction block, when this segment is technically feasible for study (that is, this is not required for segments proximal to axilla or popliteal fossa).
	www.guideline.gov /summary/summary.aspx?doc_id=3730 (613 words)

	Proximal LMN
		In regions of nerves arising from brachial plexus
		Houses terminal nerves of brachial and plexus and axillary vessels
		Motor symptoms: With ventral root or spinal cord compression
	www.neuro.wustl.edu /neuromuscular/nanatomy/proxmot.html (768 words)

	Cranial Nerves and Nuclei (Site not responding. Last check: 2007-10-08)
		Formally, a nerve component is defined as the sum of all the neurons having like anatomical and physiological characteristics so that they can act in a common mode.
		The occulomotor nerve (CN III), is a motor nerve.
		The motor component of CN V (GSE) innervated various muscles in the face, such as the muscles of mastication, and they have their cell bodies located in the motor nucleus of CN V. The facial nerve (CN VII), has two motor nuclei.
	www.cwru.edu /dental/web/neuro/cnn.html (1222 words)

	Motor nerve inexcitability in Guillain-Barre syndrome. The spectrum of distal conduction block and axonal degeneration ... (Site not responding. Last check: 2007-10-08)
		inexcitable motor nerves within 2 wks of the first symptom.
		motor nerves in the initial stages of GBS are due to distal pathology of
		the motor axons, either distal conduction block or axonal degeneration.
	brain.oxfordjournals.org /cgi/content/abstract/115/5/1291 (445 words)

	A motor nerve conduction study (MNCV.edf)
		It contains a motor nerve conduction study of the Left Median Nerve with two data records: the first one was obtained with stimulus at wrist, the second one with stimulus at elbow.
		Typically,files containing nerve conduction studies and evoked potentials are very small.
		The description about measurements, distances, etc. is located at the beginning of each data record.
	www.neurotraces.com /edf/examples/node4.html (538 words)

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