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  • Electronic Resource  (2)
  • Dopamine antagonists  (1)
  • Local muscle fatigue  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neurology 233 (1986), S. 25-29 
    ISSN: 1432-1459
    Keywords: Ballism, bilateral ; Aetiology ; Pathological substrate ; Dopamine antagonists
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Ballism rarely occurs as a bilateral phenomenon and only 12 such cases have been reported so far in the literature. A further case is reported in the present paper. The definition of bilateral ballism is discussed, its movements described and the differences from chorea outlined. The most important difference from hemiballism is in the pathological substrate where, in most bilateral cases, diffuse lesions have been reported on both sides of the basal ganglia, without preferential involvement of the subthalamic nucleus. In our case, a frontotemporal infarction was found. In the cases reported to date, the outcome had varied from death to complete recovery, partly depending on the aetiology, which is most frequently vascular. Although relevant data are scarce, dopamine antagonists appear to be the treatment of choice. We stress the role of the dopaminergic system and co-existing factors influencing the abnormal involuntary movements.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of applied physiology 58 (1988), S. 278-283 
    ISSN: 1439-6327
    Keywords: Muscle fiber conduction velocity ; Local muscle fatigue ; Force ; Intramuscular circulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Two series of experiments were performed to examine the relationship between force and change in average musle fibre conduction velocity (MFCV) during local muscle fatigue. The average MFCV was estimated using the cross-correlation method. In the first experiment this relationship was studied with surface EMG of vastus lateralis at force levels from 10 to 100% of maximal voluntary contraction (MVC) with and without occluded circulation. The product of relative force and time was held constant. At 10–20% MVC, MFCV increased slightly under the 2 conditions. Between 30–40% MVC, MFCV decreased, this decline in conduction velocity being significantly greater with occluded circulation. Above 40% MVC the decline in MFCV was larger at higher forces, but without any difference between the ischaemic and non-ischaemic conditions. In the second experiment the relationship between change in force and MFCV was studied during sustained maximal voluntary contractions of biceps brachii. MFCV declined during the first 26–39 s of the contraction, followed by an increase. Since this increase occurred when the force had dropped to 30–50% of the initial maximal force, a partial restoration of blood flow is thought to be responsible for this phenomenon. Because an increase in MFCV was noted, despite a further decline in force, this implies that at high force levels the change in MFCV during fatigue could partly be caused by mechanisms different from those accounting for the force loss. It is concluded that above 40% MVC intramuscular pressure is sufficiently high to cause ischaemia, and MFCV is found to be very sensitive to changes in intramuscular blood flow.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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