Abstract
Rapid, self paced and self terminated elbow flexion movements were studied in a group of 10 patients with dystonia affecting the arms. The movements were slower and for small amplitude movements, more variable than those recorded in normal subjects. The duration of the first agonist burst was prolonged, even when compared with normal subjects deliberately moving slowly. Cocontraction of agonist and antagonist muscles during ballistic movements was common and may contribute to the bradykinesia. These findings are compared with similar studies of other diseases of the motor system. Unlike many other conditions which also reduce the speed of ballistic voluntary movements, the patients with dystonia in the present study showed a normal symmetry of acceleration and deceleration times. One interpretation of this finding is that aspects of the basic motor programmes are relatively preserved in this condition and account for the surprising retention of motor skills shown by some patients with dystonia.
Full text
PDFSelected References
These references are in PubMed. This may not be the complete list of references from this article.
- Berardelli A., Dick J. P., Rothwell J. C., Day B. L., Marsden C. D. Scaling of the size of the first agonist EMG burst during rapid wrist movements in patients with Parkinson's disease. J Neurol Neurosurg Psychiatry. 1986 Nov;49(11):1273–1279. doi: 10.1136/jnnp.49.11.1273. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Berardelli A., Rothwell J. C., Day B. L., Kachi T., Marsden C. D. Duration of the first agonist EMG burst in ballistic arm movements. Brain Res. 1984 Jun 18;304(1):183–187. doi: 10.1016/0006-8993(84)90879-5. [DOI] [PubMed] [Google Scholar]
- Berardelli A., Rothwell J. C., Day B. L., Marsden C. D. Pathophysiology of blepharospasm and oromandibular dystonia. Brain. 1985 Sep;108(Pt 3):593–608. doi: 10.1093/brain/108.3.593. [DOI] [PubMed] [Google Scholar]
- Brown S. H., Cooke J. D. Amplitude- and instruction-dependent modulation of movement-related electromyogram activity in humans. J Physiol. 1981 Jul;316:97–107. doi: 10.1113/jphysiol.1981.sp013775. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Fagioli S., Berardelli A., Hallett M., Accornero N., Manfredi M. The first agonist and antagonist burst in patients with an upper motor neuron syndrome. Mov Disord. 1988;3(2):126–132. doi: 10.1002/mds.870030204. [DOI] [PubMed] [Google Scholar]
- Hallett M., Alvarez N. Attempted rapid elbow flexion movements in patients with athetosis. J Neurol Neurosurg Psychiatry. 1983 Aug;46(8):745–750. doi: 10.1136/jnnp.46.8.745. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hallett M. Ballistic elbow flexion movements in patients with amyotrophic lateral sclerosis. J Neurol Neurosurg Psychiatry. 1979 Mar;42(3):232–237. doi: 10.1136/jnnp.42.3.232. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hallett M., Khoshbin S. A physiological mechanism of bradykinesia. Brain. 1980 Jun;103(2):301–314. doi: 10.1093/brain/103.2.301. [DOI] [PubMed] [Google Scholar]
- Hallett M., Marsden C. D. Ballistic flexion movements of the human thumb. J Physiol. 1979 Sep;294:33–50. doi: 10.1113/jphysiol.1979.sp012913. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hallett M., Shahani B. T., Young R. R. EMG analysis of patients with cerebellar deficits. J Neurol Neurosurg Psychiatry. 1975 Dec;38(12):1163–1169. doi: 10.1136/jnnp.38.12.1163. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Nakashima K., Rothwell J. C., Day B. L., Thompson P. D., Shannon K., Marsden C. D. Reciprocal inhibition between forearm muscles in patients with writer's cramp and other occupational cramps, symptomatic hemidystonia and hemiparesis due to stroke. Brain. 1989 Jun;112(Pt 3):681–697. doi: 10.1093/brain/112.3.681. [DOI] [PubMed] [Google Scholar]
- Ostry D. J., Cooke J. D., Munhall K. G. Velocity curves of human arm and speech movements. Exp Brain Res. 1987;68(1):37–46. doi: 10.1007/BF00255232. [DOI] [PubMed] [Google Scholar]
- Penney J. B., Jr, Young A. B. Striatal inhomogeneities and basal ganglia function. Mov Disord. 1986;1(1):3–15. doi: 10.1002/mds.870010102. [DOI] [PubMed] [Google Scholar]
- Rothwell J. C., Obeso J. A., Day B. L., Marsden C. D. Pathophysiology of dystonias. Adv Neurol. 1983;39:851–863. [PubMed] [Google Scholar]
- Simpson J. A. Editorial: SI units and problems of communication. J Neurol Neurosurg Psychiatry. 1975 Jan;38(1):1–5. doi: 10.1136/jnnp.38.1.1. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tatton W. G., Bedingham W., Verrier M. C., Blair R. D. Characteristic alterations in responses to imposed wrist displacements in parkinsonian rigidity and dystonia musculorum deformans. Can J Neurol Sci. 1984 May;11(2):281–287. doi: 10.1017/s0317167100045546. [DOI] [PubMed] [Google Scholar]
- Thompson P. D., Berardelli A., Rothwell J. C., Day B. L., Dick J. P., Benecke R., Marsden C. D. The coexistence of bradykinesia and chorea in Huntington's disease and its implications for theories of basal ganglia control of movement. Brain. 1988 Apr;111(Pt 2):223–244. doi: 10.1093/brain/111.2.223. [DOI] [PubMed] [Google Scholar]
- Yanagisawa N., Goto A. Dystonia musculorum deformans. Analysis with electromyography. J Neurol Sci. 1971 May;13(1):39–65. doi: 10.1016/0022-510x(71)90206-1. [DOI] [PubMed] [Google Scholar]