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Nerve Conduction Velocity

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101. Motor and sensory nerve conduction velocity in the baboon: normal values and changes during acrylamide neuropathy (PubMed)

Motor and sensory nerve conduction velocity in the baboon: normal values and changes during acrylamide neuropathy Nerve conduction velocity and the amplitude of nerve and muscle action potentials have been measured in the median and anterior tibial nerves of normal adult and infant baboons. The effect of altered temperature on velocity has also been investigated. Seven adult baboons were intoxicated with acrylamide. In animals given 10-15 mg/kg/day, the gradual development of a peripheral (...) neuropathy was accompanied by a decline in the amplitude of both muscle and nerve action potentials. There was also a gradual fall in conduction velocity. In some cases maximal motor velocity in the median nerve fell by as much as 34%, and in the anterior tibial nerve by as much as 49%, the largest falls being seen in animals showing the greatest reductions in response amplitude. Histological studies, reported elsewhere, have shown that the main pathological change in our animals was a degeneration

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1971 Journal of neurology, neurosurgery, and psychiatry

102. Slow Nerve Conduction Velocity in Cretins (PubMed)

Slow Nerve Conduction Velocity in Cretins 4331578 1972 02 25 2018 11 13 1468-2044 46 250 1971 Dec Archives of disease in childhood Arch. Dis. Child. Slow nerve conduction velocity in cretins. 852-4 Moosa A A Dubowitz V V eng Journal Article England Arch Dis Child 0372434 0003-9888 IM Age Determination by Skeleton Child Child, Preschool Congenital Hypothyroidism epidemiology physiopathology therapy Humans Infant Infant, Newborn Mass Screening Neural Conduction Peripheral Nerves growth (...) & development Tibial Nerve physiopathology Ulnar Nerve physiopathology 1971 12 1 1971 12 1 0 1 1971 12 1 0 0 ppublish 4331578 PMC1647955 Br Med Bull. 1960 May;16:122-7 13819135 J Pediatr. 1964 Apr;64:589-600 14144759 Acta Anat (Basel). 1955;25(2-4):160-83 13353976 Electroencephalogr Clin Neurophysiol. 1968 Oct;25(4):351-8 4176540 Dtsch Med Wochenschr. 1969 Mar 21;94(12):599-601 5813355 Arch Dis Child. 1965 Dec;40(214):612-7 5844951 Pediatrics. 1964 Nov;34:708-27 14231364 J Neurochem. 1969 Oct;16(10):1477-84

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1971 Archives of Disease in Childhood

103. Effect of magnesium on nerve conduction velocity during regular dialysis treatment (PubMed)

Effect of magnesium on nerve conduction velocity during regular dialysis treatment Serial nerve conduction velocities in the peroneal and ulnar nerves have been measured in 10 patients on regular dialysis treatment over a three year period. Each patient alternated between phases on dialysis with magnesium-containing dialysate (1·5-1·7 m-equiv/l.) and phases on `magnesium-free' dialysate (0·2 m-equiv/l.). Plasma magnesium concentrations were high both pre- and post-dialysis during magnesium (...) -containing dialysis, and normal to low on magnesium-free dialysis. All patients had defects in nerve conduction, mainly asymptomatic. Increases in nerve conduction velocity coincided with magnesium-free dialysis, and decreases occurred when the patients reverted to magnesium-containing dialysate. The significance of the correlation by the sign test was P<0·0005. It is concluded that extracellular magnesium levels can influence the rate of nerve conduction in vivo.

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1972 Journal of neurology, neurosurgery, and psychiatry

104. A preclinical case of late adult metachromatic leukodystrophy?: Manifestation only with lipid abnormalities in urine, enzyme deficiency, and decrease of nerve conduction velocity (PubMed)

A preclinical case of late adult metachromatic leukodystrophy?: Manifestation only with lipid abnormalities in urine, enzyme deficiency, and decrease of nerve conduction velocity In a clinically unremarkable 39 year old sister of a patient afflicted with late adult metachromatic leukodystrophy, metachromatic deposits in the epithelial cells of the urine sediment, a high sulphatide excretion in the urine, and a deficiency of arylsulphatase A in urine and leucocytes were found. The motor nerve (...) conduction velocity of the peripheral nerves in upper and lower extremities was distinctly decreased. Cerebral disturbances were not evident. It is surmised that this patient is a case of late adult metachromatic leukodystrophy in an early stage of the disease without obvious clinical signs. The peripheral neuropathy found by neurophysiological examination is interpreted as an early symptom of the disease.

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1972 Journal of neurology, neurosurgery, and psychiatry

105. Nerve potentials and afferent conduction velocities in the differential diagnosis of amyotrophy of the hand (PubMed)

Nerve potentials and afferent conduction velocities in the differential diagnosis of amyotrophy of the hand Nerve action potentials recorded over the elbow after stimulation of the wrist were studied in patients with hand amyotrophy of different origin. In amyotrophic lateral sclerosis the amplitude of nerve action potentials does not change significantly even with extreme muscle wasting and loss of motor units.Studies of multisegmental afferent conduction velocities may demonstrate a strictly

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1972 Journal of neurology, neurosurgery, and psychiatry

106. Nerve conduction velocity and hypertension. (PubMed)

Nerve conduction velocity and hypertension. 4726164 1973 10 26 2018 11 13 0007-1447 3 5878 1973 Sep 01 British medical journal Br Med J Nerve conduction velocity and hypertension. 500-1 Bridgman J F JF Bidgood L L Hoole R R eng Journal Article England Br Med J 0372673 0007-1447 AIM IM Adult Aged Female Humans Hypertension physiopathology Male Median Nerve physiopathology Middle Aged Neural Conduction Tibial Nerve physiopathology Ulnar Nerve physiopathology 1973 9 1 1973 9 1 0 1 1973 9 1 0 0

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1973 British medical journal

107. Motor nerve conduction velocity in peroneal muscular atrophy: evidence for genetic heterogeneity (PubMed)

Motor nerve conduction velocity in peroneal muscular atrophy: evidence for genetic heterogeneity Measurements of motor nerve conduction velocity are reported in 88 subjects from 20 families in which a clinical diagnosis of peroneal muscular atrophy had been made in the index cases. The values display a bimodal distribution. The majority of cases show a substantially reduced conduction velocity, a smaller group displaying velocities within the normal range or only slightly decreased

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1974 Journal of neurology, neurosurgery, and psychiatry

108. Relationships between motor nerve conduction velocities and motor unit contraction characteristics in a slow twitch muscle of the cat (PubMed)

Relationships between motor nerve conduction velocities and motor unit contraction characteristics in a slow twitch muscle of the cat 1. Isometric contractions of cat soleus muscles and of functionally isolated motor units have been measured under conditions similar to those of Bagust, Knott, Lewis, Luck & Westerman (1973).2. The muscle lengths at which motor unit twitch and tetanus tensions were maximal were close to the optimal lengths of the parent muscles.3. Motor unit contraction times (...) and tensions were shown to be related to the conduction velocities of the nerve axons supplying them. These relationships were obscured when a number of small samples from several experiments were grouped together.4. The ratios of the twitch to the tetanic tensions of the motor units were directly related to their times to peak tension.

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1974 The Journal of physiology

109. Fact and fallacy in measurement of conduction velocity in motor nerves (PubMed)

Fact and fallacy in measurement of conduction velocity in motor nerves 14213466 1996 12 01 2018 12 01 0022-3050 27 1964 Oct Journal of neurology, neurosurgery, and psychiatry J. Neurol. Neurosurg. Psychiatry FACT AND FALLACY IN MEASUREMENT OF CONDUCTION VELOCITY IN MOTOR NERVES. 381-5 SIMPSON J A JA eng Journal Article England J Neurol Neurosurg Psychiatry 2985191R 0022-3050 OM Arm Humans Neural Conduction Oscillometry Peripheral Nerves ARM NEURAL CONDUCTION OSCILLOMETRY PERIPHERAL NERVES 1964

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1964 Journal of neurology, neurosurgery, and psychiatry

110. The relation between conduction velocity and the electrical resistance outside a nerve fibre (PubMed)

The relation between conduction velocity and the electrical resistance outside a nerve fibre 16995066 2007 02 05 2008 11 20 0022-3751 94 4 1939 Jan 14 The Journal of physiology J. Physiol. (Lond.) The relation between conduction velocity and the electrical resistance outside a nerve fibre. 560-70 Hodgkin A L AL eng Journal Article England J Physiol 0266262 0022-3751 1939 1 14 0 0 1939 1 14 0 1 1939 1 14 0 0 ppublish 16995066 PMC1393884

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1939 The Journal of physiology

111. Biofeedback treatment of foot drop after stroke compared with standard rehabilitation technique (part 2): effects on nerve conduction velocity and spasticity. (PubMed)

Biofeedback treatment of foot drop after stroke compared with standard rehabilitation technique (part 2): effects on nerve conduction velocity and spasticity. Peroneal nerve conduction velocity (NCV) was determined in 20 hemiplegic patients with chronic foot drop. At the initial visit, relative slowing of NCV of the affected leg was observed. The patients were randomly separated into two groups, and treated for five weeks by different therapies--group 1 by conventional physical exercise

1976 Archives of physical medicine and rehabilitation

112. Electrophysiological aspects of sensory conduction velocity in healthy adults. 1. Conduction velocity from digit to palm, from palm to wrist, and across the elbow, as a function of age. (PubMed)

Electrophysiological aspects of sensory conduction velocity in healthy adults. 1. Conduction velocity from digit to palm, from palm to wrist, and across the elbow, as a function of age. The sensory conduction velocity from digit to palm and from palm to wrist was determined in median (digit 3) and ulnar (digit 5) nerves in 47 healthy subjects with age range from 21 to 77 years. The decrement of the sensory conduction as a function of age was more marked in the palm to wrist than in the digit (...) to palm segment. Sensory conduction velocity of the ulnar nerve across the elbow was also studied. Irregularities in the shape of the sensory evoked potential recorded above the cubital sulcus were found in 12.76% of cases, especially in subjects over 50 years of age. These results suggest that aging causes decrement in sensory conduction and changes in the shape of the evoked potentials, especially at points where the nerves are more frequently compressed.

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1978 Journal of neurology, neurosurgery, and psychiatry

113. Administration of Oxygen Ultra-Fine Bubbles Improves Nerve Dysfunction in a Rat Sciatic Nerve Crush Injury Model (PubMed)

) diluted in saline three times per week for 4 weeks in four groups: (1) control, (sham operation + saline); (2) SNC, (crush + saline); (3) SNC+OUB, (crush + OUB-saline); (4) SNC+NUB, (crush + NUB-saline). The effects of the OUBs on dorsal root ganglion (DRG) neurons and Schwann cells (SCs) were examined by serial dilution of OUB medium in vitro. Sciatic functional index, paw withdrawal thresholds, nerve conduction velocity, and myelinated axons were significantly decreased in the SNC group compared (...) Administration of Oxygen Ultra-Fine Bubbles Improves Nerve Dysfunction in a Rat Sciatic Nerve Crush Injury Model Ultra-fine bubbles (<200 nm in diameter) have several unique properties and have been tested in various medical fields. The purpose of this study was to investigate the effects of oxygen ultra-fine bubbles (OUBs) on a sciatic nerve crush injury (SNC) model rats. Rats were intraperitoneally injected with 1.5 mL saline, OUBs diluted in saline, or nitrogen ultra-fine bubbles (NUBs

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2018 International journal of molecular sciences

114. The neural regeneration effect of chitin biological absorbable tubes bridging sciatic nerve defects with sural nerve grafts (PubMed)

and morphology of regenerating myelinated fibers, nerve function index, nerve conduction velocity, and motor end plate and triceps surae muscle morphology were evaluated.The number and morphology of regenerated fibers, nerve function index, nerve conduction velocity, and motor end plate and triceps surae muscle morphology were improved in rats in which the nerve defect was bridged with chitin biological absorbable tubes compared with rats in which the defect was repaired without tubes.The findings suggest (...) The neural regeneration effect of chitin biological absorbable tubes bridging sciatic nerve defects with sural nerve grafts To investigate the feasibility and efficacy of sural nerve grafts for repairing sciatic nerve defects using a chitin biological absorbable tube bridge.A sciatic nerve defect model in the rat was produced, and the sural nerve, cut from the ipsilateral leg, was used as a graft to repair the defect using chitin biological absorbable tube bridges. Then the number

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2018 American journal of translational research

115. Electroacupuncture and moxibustion promote regeneration of injured sciatic nerve through Schwann cell proliferation and nerve growth factor secretion (PubMed)

regeneration after peripheral nerve injury. We first established rat models of sciatic nerve injury using neurotomy. Rats were treated with electroacupuncture or moxibustion at acupoints Huantiao (GB30) and Zusanli (ST36). Each treatment lasted 15 minutes, and treatments were given six times a week for 4 consecutive weeks. Behavioral testing was used to determine the sciatic functional index. We used electrophysiological detection to measure sciatic nerve conduction velocity and performed hematoxylin-eosin (...) staining to determine any changes in the gastrocnemius muscle. We used immunohistochemistry to observe changes in the expression of S100-a specific marker for Schwann cells-and an enzyme-linked immunosorbent assay to detect serum level of nerve growth factor. Results showed that compared with the model-only group, sciatic functional index, recovery rate of conduction velocity, diameter recovery of the gastrocnemius muscle fibers, number of S100-immunoreactive cells, and level of nerve growth factor

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2018 Neural Regeneration Research

116. Palm to Finger Ulnar Sensory Nerve Conduction (PubMed)

Palm to Finger Ulnar Sensory Nerve Conduction Ulnar neuropathy at the wrist (UNW) is rare, and always challenging to localize. To increase the sensitivity and specificity of the diagnosis of UNW many authors advocate the stimulation of the ulnar nerve (UN) in the segment of the wrist and palm. The focus of this paper is to present a modified and simplified technique of sensory nerve conduction (SNC) of the UN in the wrist and palm segments and demonstrate the validity of this technique (...) in the study of five cases of type III UNW. The SNC of UN was performed antidromically with fifth finger ring recording electrodes. The UN was stimulated 14 cm proximal to the active electrode (the standard way) and 7 cm proximal to the active electrode. The normal data from amplitude and conduction velocity (CV) ratios between the palm to finger and wrist to finger segments were obtained. Normal amplitude ratio was 1.4 to 0.76. Normal CV ratio was 0.8 to 1.23.We found evidences of abnormal SNAP amplitude

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2015 Neurology international

117. Cordycepin Decreases Compound Action Potential Conduction of Frog Sciatic Nerve In Vitro Involving Ca2+-Dependent Mechanisms (PubMed)

of cordycepin on CNAP conduction should be elucidated. In this study, the conduction ability of CNAP in isolated frog sciatic nerves was investigated. Results revealed that cordycepin significantly decreased CNAP amplitude and conductive velocity in a reversible and concentration-dependent manner. At 50 mg/L cordycepin, CNAP amplitude and conductive velocity decreased by 62.18 ± 8.06% and 57.34% ± 6.14% compared with the control amplitude and conductive velocity, respectively. However, the depressive action (...) of cordycepin on amplitude and conductive velocity was not observed in Ca(2+)-free medium or in the presence of Ca(2+) channel blockers (CdCl2/LaCl3). Pretreatment with L-type Ca(2+) channel antagonist (nifedipine/deltiazem) also blocked cordycepin-induced responses; by contrast, T-type and P-type Ca(2+) channel antagonists (Ni(2+)) failed to block such responses. Therefore, cordycepin decreased the conduction ability of CNAP in isolated frog sciatic nerves via L-type Ca(2+) channel-dependent mechanism.

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2015 Neural plasticity

118. The Effect of Light Therapy on Superficial Radial Nerve Conduction Using a Clustered Array of Infrared Super luminous Diodes and Red Light Emitting Diodes. (PubMed)

the application of light irradiation. Negative peak latency (NPL) and conduction velocity (NCV) for the superficial radial nerve were measured before treatment and for 10-minutes following treatment at 2-minute intervals. Skin temperature was monitored throughout.No significant differences between groups and over time for NPL, NCV, or temperature difference scores were identified. However, a significant increase in skin temperature was measured over time at each time point compared to baseline.Light (...) The Effect of Light Therapy on Superficial Radial Nerve Conduction Using a Clustered Array of Infrared Super luminous Diodes and Red Light Emitting Diodes. Lasers, light emitting diodes (LEDs) and super luminous diodes (SLDs) are widely used to treat selected musculoskeletal, integumentary and neurological conditions.The mechanisms underlying the reported treatment effects of light therapy are unclear and the physiologic effect of light on a variety of tissues, particularly neurological

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2015 Journal of lasers in medical sciences

119. Tissue-engineered rhesus monkey nerve grafts for the repair of long ulnar nerve defects: similar outcomes to autologous nerve grafts (PubMed)

conduction velocity, or the number of neurofilaments between the experimental and control groups. However, outcome was significantly better in the experimental group than in the blank group. These findings suggest that chemically extracted allogeneic nerve seeded with autologous Schwann cells can repair 40-mm ulnar nerve defects in the rhesus monkey. The outcomes are similar to those obtained with autologous nerve graft. (...) Tissue-engineered rhesus monkey nerve grafts for the repair of long ulnar nerve defects: similar outcomes to autologous nerve grafts Acellular nerve allografts can help preserve normal nerve structure and extracellular matrix composition. These allografts have low immunogenicity and are more readily available than autologous nerves for the repair of long-segment peripheral nerve defects. In this study, we repaired a 40-mm ulnar nerve defect in rhesus monkeys with tissue-engineered peripheral

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2016 Neural Regeneration Research

120. Protective effect of biodegradable nerve conduit against peripheral nerve adhesion after neurolysis. (PubMed)

the nerve and strongly adhered to the nerve biomechanically and histologically. The motor nerve conduction velocity and gastrocnemius muscle weight were the lowest in this group. Conversely, the adhesion scores were significantly lower, motor nerve conduction velocity was significantly higher, and gastrocnemius muscle weight was significantly higher in the nerve wrap group than in the adhesion group. Additionally, the biomechanical breaking strength was significantly lower in the nerve wrap group than (...) Protective effect of biodegradable nerve conduit against peripheral nerve adhesion after neurolysis. OBJECTIVE Peripheral nerve adhesion caused by extraneural and intraneural scar formation after neurolysis leads to nerve dysfunction. The authors previously developed a novel very flexible biodegradable nerve conduit composed of poly(L-lactide) and poly(ε-caprolactone) for use in peripheral nerve regeneration. In the present study, they investigated the effect of protective nerve wrapping

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2017 Journal of Neurosurgery

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