Journal ArticleDOI
The distribution of muscle weakness in upper motoneuron lesions affecting the lower limb
TLDR
The strength of muscles on the clinically unaffected side was reduced compared with control subjects, although no muscle groups were especially affected, and the distribution of weakness in the lower limb was determined.Abstract:
To determine the distribution of weakness in the lower limb after upper motoneuron lesions the strength of 8 muscle groups was measured. Four groups of patients were studied: 22 control subjects, 16 patients with unilateral leg paresis, 4 patients with severe unilateral paralysis and 5 patients with paraparesis. In the testing posture (seated), patients with cerebral upper motoneuron lesions showed no selective loss of power in flexors or extensors on the contralateral side. Gravitational torques were included in the measurements. However, proximal muscles (acting at hip and knee) were significantly less severely affected than more distal muscles (acting at ankle and hallux). At any particular joint, physiological flexors and extensors were affected equally in both the hemiparetic and paraparetic subjects. As in the upper limb (Colebatch and Gandevia, 1989), the strength of muscles on the clinically unaffected side was reduced compared with control subjects, although no muscle groups were especially affected.read more
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Early stages in a sensorimotor transformation
TL;DR: A model for several early stages of the sensorimotor transformations involved in targeted arm movement is presented, suggesting that the combination of these representations of initial and final arm orientations could give rise to the representation of movement direction recorded in the motor cortex by Georgopoulos and his colleagues.
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Plantarflexor weakness as a limiting factor of gait speed in stroke subjects and the compensating role of hip flexors
TL;DR: Whether plantarflexor weakness is among the factors preventing stroke subjects from walking at faster speeds is investigated using the Muscular Utilization Ratio (MUR) method.
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Weakness and strength training in persons with poststroke hemiplegia: rationale, method, and efficacy.
TL;DR: This review examines the clinical and functional phenomena of weakness in poststroke hemiplegia, currently available evidence identifying physiologic substrates contributing to weakness, and reports of early investigations involving high-resistance training targeted at improving strength and the transfer of strength to improvements in functional capacity.
Journal ArticleDOI
The relationship of lower-extremity muscle torque to locomotor performance in people with stroke.
C.Maria Kim,Janice J. Eng +1 more
TL;DR: Muscle performance measurements of both limbs should be included in the evaluation of locomotion and treatment of people following a stroke, and Muscle force could explain 66% to 72% of the variability in gait and stair-climbing speeds.
Journal ArticleDOI
Reliability and comparison of weight-bearing ability during standing tasks for individuals with chronic stroke
Janice J. Eng,Kelly S. Chu +1 more
TL;DR: In this paper, the authors compared the performance of the paretic and non-paretic limb during standing tasks with respect to the vertical ground reaction force (VRCF) during five standing tasks (rising from a chair, quiet standing, weight shifting forward, backward, laterally).
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