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Query: UMLS:C0004134 (ataxia)
 15,886 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Toluene appears to produce reversible effects upon liver, renal and nervous systems. Its usual route of intake is via respiration. The nervous system appears to be the most sensitive to the effects of toluene. Although there are few studies of toluene's neurotoxicity, some tenuous results can be cited. High level toluene exposures produced incoordination, ataxia, unconsciousness and eventually, death. Lower level acute exposures in man produce dizziness, exhilaration and confusion. Activity level has been inadequately studied. Schedule controlled behaviors have been reported to produce inverted U-shaped concentration-effect curves on response rate measures. Alterations at levels as low as 150 ppm have been reported when appetitive contingencies are used. Very few studies of the nervous system have been performed at levels below 1000 ppm and most of the results were inconclusive. The TLV (threshold limit value) of toluene has been set at 100 ppm for 8 hrs. No exposures on possible groups at special risk, such as perinatal, aged or impaired subjects have been made. Few studies of reversibility of effects in the nervous system have been reported. Much more work is needed before strong conclusions can be drawn.
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PMID:Neurobehavioral effects of toluene: a review. 703 26

A subject presenting a rare association of left labyrinthine and left hemispheric cerebellar lesion was examined, with recording and analysis of eye movements at different intervals. A complete compensation of the vestibular deficit and recovery of cerebellar postural ataxia, with persistence of limb incoordination and oculomotor abnormalities, were observed. The saccadic, smooth pursuit and optokinetic nystagmus systems were impaired. Ocular signs, in combination, may suggest a cerebellar dysfunction but they do not supply sufficient diagnostic criteria for localizing the cerebellar damage. Only the direction-specific impairment of smooth pursuit and optokinetic nystagmus is indicative of the side of the lesion.
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PMID:Oculomotor abnormalities after labyrinthine and cerebellar lesion. A case report. 707 Jul 92

The authors report a case of Charcot-Marie-Tooth disease that mimicked Friedreich's ataxia and featured impaired tendon reflexes in the limbs, incoordination mimicking cerebellar disease in the extremities, extensor plantar responses on both sides, bilateral foot deformity, imparied position sense in the toes, absent vibratory sense in the distal parts of the legs and minimal distal weakness with wasting. Motor conduction velocity in the upper limbs was substantially reduced. Other cases similar in nature reported in the literature resemble spino-cerebellar degeneration in general, and Friedreich's ataxia, in particular. It is emphasized that the natural history, EMG, motor conduction velocity studies and examination of other affected members of the family permit the correct diagnosis to be made in such cases. It is also emphasized that patients similar to the one reported here may also resemble, and should be differentiated from, cases of familial dorsal column ataxia (Biemond type). Stress is put upon the fact that when Charcot-Marie-Tooth disease mimicks spino-cerebellar degeneration, substantial slowing of motor conduction in the upper limbs is generally sufficient to establish the diagnosis. The relation between Friedreich's ataxia an Charcot-Marie-Tooth disease is reviewed and it is concluded that these two disorders are distinct clinical and pathological entities.
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PMID:A case of Charcot-Marie-Tooth disease mimicking Friedreich's ataxia: is there any association between friedreich's ataxia and Charcot-Marie-Tooth disease? 710 97

Sixty children who survived meningitis during the outbreak of meningococcal group B infection in Bolton 1971-74 were assessed between 5 and 9 years later. Each case, together with a matched control, has been examined clinically and subjected to a number of psychological tests and to routine audiology. The results, unlike those from other series, did not demonstrate any incoordination, ataxia, or other physical abnormality, nor was there any statistically significant impairment on psychological testing. The incidence of sensorineural deafness (5%), although marginally lower, was comparable with the best of other series. When compared with the incidence in controls (3%) it is not statistically significant. A 'mattress test', suggestive of vestibular damage, was positive in those with more severe degrees of sensorineural deafness. The high mortality in the Bolton series (17%) has been reconsidered and it is concluded that unless a potent meningococcus type B vaccine is developed, mortality would still be high in a similar outbreak today.
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PMID:Outcome of meningococcal group B meningitis. 711 79

Solvents were tested for their influence on motivational state, as well as for their sedative effects, after intraperitoneal administration. The following tests were used: open field (exploratory activity, locomotion), activity wheel (running activity), tube test and tilted plane (muscle weakness, incoordination). The agents proved to be similar in causing muscle weakness and ataxia already at low dose levels. Benzene was the most potent in this respect. The three solvents, however, contrasted strongly in influencing motor activity. While benzene and especially toluene exerted CNS stimulation, no such effect could be detected following m-xylene treatment. On the basis of human experiences with these substances it may be suggested that the screening procedure applied in rats might be useful for predicting acute adverse effects in man.
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PMID:Comparative study on the acute effects of benzene, toluene and m-xylene in the rat. 717 Sep 84

In a previously unreported family with olivopontocerebellar atrophy, the kindred contained over 600 individuals in five generations. Of 83 offsping of affected individuals who over over 38.8 years of age (the mean age of the onset of disease in this family), 47 had ataxia; there was autosomal dominant transmission. Clinical findings included lower bulbar palsies, hyperreflexia, ataxia, incoordination, scanning and explosive speech, and, in some, slow motor-nerve conduction velocities. There was cortical and cerebellar atrophy of pontine nuclei, inferior olives, and XII nuclei, and loss of Purkinje cells in the cerebellum. Seventy-three individuals of the III and IV generations were typed for HLA histocompatibility antigens. A maximum lod score of 1.97 was found at male recombination fraction 0.18 and female recombination fraction 0.36. When the lod score values reported in other studies were combined with the values in this family, the maximum lod score was found to be 4.681 at a recombination frequency of 0.22.
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PMID:A family with hereditary ataxia: HLA typing. 718 30

After reviewing the size of the problem of multiple sclerosis, and the likely case-load for doctors in different settings, this paper than proceeds to consider the major challenges in management and rehabilitation for this disease. The latter resolve themselves into what to discuss with the patient; relapses and their prevention, including general advice on such matters as stress, pregnancy, and infection; major problems including bladder and bowel dysfunction, sexual difficulties, spasticity, ataxia and incoordination, vision, and intellectual and psychological manifestations, and other problems, such as menstruation, obesity, and pressure sores. The paper concludes with a discussion of the role of specialist physicians.
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PMID:Multiple sclerosis--management and rehabilitation. 720 3

Two patients are reported presenting with incoordination mimicking cerebellar disease in the upper and lower limbs, ataxia of gait, absent tendon reflexes and little or no clinically detectable wasting. Motor conduction velocity in the upper limbs was substantially reduced in one patient whereas it was normal and slightly reduced in the other. It is concluded that in Charcot-Marie Tooth disease incoordination may mimic cerebellar disease and when this is so it is due to the association of varying degrees of proprioceptive deafferentation and a dyskinesia similar to that produced by familial (essential) tremor.
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PMID:Unusual presentation of Charcot Marie-Tooth disease-incoordination with absent of minimal wasting-Report of 2 cases. 722 62

A 71-year-old male with a null cell pituitary macroadenoma was given peripituitary region radiotherapy (4,346 Gy units) over a 1-month-period and 6 weeks later developed the rapid onset of blurred vision, diplopia, ataxia, incoordination, cranial nerve palsy, somnolence, and respiratory distress. His fixed neurologic deficits required ventilatory support, feeding tube placement, and chronic hospitalization until his death 1 year later. At autopsy, necrotic foci with dystrophic axonal calcification were found throughout the brainstem, associated with mild focal vascular hyalinization but without fibrinoid necrosis, telangiectasias or large vessel abnormalities. This unusual case of fatal "early delayed" radiation injury is compared to previous literature cases.
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PMID:Necrotizing brainstem leukoencephalopathy six weeks following radiotherapy. 760 98

We describe a 12-year-old black male who presented with cervical lymphadenopathy, hepatosplenomegaly of 3 months duration, and ataxia and incoordination of recent onset. Hodgkin's disease, stage IVB, was diagnosed. An MRI of the head demonstrated a nonenhancing, well-defined pontine lesion. The pontine lesion and the associated neurologic symptoms were consistent with central pontine myelinolysis. Treatment of Hodgkin's disease resulted in complete remission and complete disappearance of the pontine abnormality.
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PMID:Hodgkin's disease associated with central pontine myelinolysis. 768 85


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