Force regulation is deficient in patients with parietal lesions: a system-analytic approach

By means of a quantitative system-analytic investigation strategy, the postural motor control of the fingers was evaluated, to characterise the possible deficit of force regulation in patients with parietal lesions. In spite of a normal response to short torque pulses, the parietal-lesion patients h...

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Bibliographic Details
Published in:Electroencephalography and clinical neurophysiology 1998-06, Vol.109 (3), p.203-214
Main Authors: Scholle, H.-Ch, Bradl, U., Hefter, H., Dohle, Ch, Freund, H.-J.
Format: Article
Language:English
Subjects:
Adult
Aged
Aged, 80 and over
Algorithms
Biological and medical sciences
Brain Ischemia - physiopathology
Brain Neoplasms - physiopathology
Degenerative and inherited degenerative diseases of the nervous system. Leukodystrophies. Prion diseases
Female
Fingers - physiology
Humans
Magnetic Resonance Imaging
Male
Medical sciences
Middle Aged
Motor control
Movement - physiology
Muscle Contraction - physiology
Neurology
Parietal cortex
Parietal Lobe - injuries
Parietal Lobe - physiopathology
Posture - physiology
Reference Values
System-analytic quantification
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Summary:By means of a quantitative system-analytic investigation strategy, the postural motor control of the fingers was evaluated, to characterise the possible deficit of force regulation in patients with parietal lesions. In spite of a normal response to short torque pulses, the parietal-lesion patients had difficulties in returning to the preload level after the application of an additional step torque load to fingers II–IV of their left or right hands. The control offset (measured 500 ms after step torque application) was significantly larger in the patient group. This deficit in the investigated patients with parietal lesions to compensate for step torque loads was not due to a paresis, but rather resulted from a disturbance in the generation of a sufficient counterforce against the applied step torque within an adequate time window and motor pattern. This distinct force-regulation deficit was found in patients with left- and right-sided parietal lesions.
ISSN:0924-980X
0013-4694
1872-7093
DOI:10.1016/S0924-980X(98)00010-1