Mechanisms of disturbed motor control in ankle weakness during gait after stroke

Lamontagne, Anouk; Malouin, Francine; Richards, Carol L.; Dumas, Francine

doi:10.1016/s0966-6362(01)00190-4

Cited by 181 publications

(149 citation statements)

References 33 publications

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“…The statistical analysis showed that spasticity and the strength-related parameter peak velocity in dorsiflexion were mainly responsible for this finding. This is in line with works in patients with stroke and cerebral palsy, which reported plantarflexor stiffness and dorsiflexor paresis to be possible mechanisms for the failure to produce adequate dorsiflexion movements 25,30 . However, the statistical model only accounts for about a third of the observed variation in the data.…”

Section: Reliability Of Alternating Foot Dorsi-and Plantarflexionsupporting

confidence: 72%

“…An impaired ankle dorsiflexion was shown to be a particular problem in stroke patients 14,30,34,35 and a delayed initiation of dorsiflexion in the swing phase is a predictor of falls in elderly people 36 . With a view to rehabilitation, ankle dorsiflexion has been proposed as a potential marker for gains in motor control of the lower extremity and as a substitute for multi joint walking movements of the affected leg in patients with stroke and SCI 14 .…”

Section: Relationship Of Paresis and Dexterity To Functionmentioning

confidence: 99%

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Foot control in incomplete SCI: distinction between paresis and dexterity

Wirth

Hedel

Curt

2008

Neurological Research

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Objective: To complement the clinical assessment of motor impairment after incomplete spinal cord injury (iSCI) by introducing a test that reliably distinguishes between muscle weakness (paresis) and impairment of dexterity in a simple foot motor task. Methods: Auditory-paced ankle dorsi-and plantarflexion, in a supine position, was studied in 30 controls (to establish control values and to test reliability) and in 16 iSCI patients (test validation). The subjects were instructed to initiate dorsi-and plantarflexion as accurately in timing and with the largest range of motion (ROM) possible. For each frequency, accuracy of timing, ROM, peak velocity of dorsi-and plantarflexion and a time quotient for changing from dorsi-to plantarflexion and vice versa were determined. In iSCI subjects, these parameters were related to clinical measures of paresis, spasticity and proprioception. Results: The test parameters showed good to very good reliability. The iSCI subjects were able to follow the target frequency with high accuracy, while ROM and peak velocity for dorsi-and plantarflexion were significantly reduced. Furthermore, there was a strong correlation between ROM/peak velocities and motor scores within the iSCI patients. Discussion: Repetitive foot dorsi-and plantarflexion enables a distinction to be made between muscle weakness and reduced dexterity as the underlying cause of affected foot control. This distinction between and quantification of these two movement components complements the existing clinical examination, and in follow-up works, the recovery of these components may provide further insight into the mechanisms underlying motor function improvement after iSCI. [Neurol Res 2008; 30: 52-60]

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Section: Reliability Of Alternating Foot Dorsi-and Plantarflexionsupporting

confidence: 72%

Section: Relationship Of Paresis and Dexterity To Functionmentioning

confidence: 99%

Foot control in incomplete SCI: distinction between paresis and dexterity

Wirth

Hedel

Curt

2008

Neurological Research

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“…This pattern was thought to result from a modulation of agonist/antagonist activity in the ipse-and contralaterallimb at a spinal level. Other authors found the same increased spasticity in the healthy limb [27,28]. These ipselateral findings may be a primary effect of the neurological lesion affecting the low percentage of pyramidal tract using unilateral pathways.…”

Section: Healthy Lower Limb Of Patientsmentioning

confidence: 60%

Efficiency of work production by spastic muscles

et al. 2005

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“…Although this line of reasoning is supported by neuroscientific knowledge, the research involving stroke subjects has given little attention to the comprehension of the behaviour of the ipsilesional side, usually referred to as the non-affected side (Hall et al, 2011;Lamontagne et al, 2002;Lamontagne et al, 2000;Milot et al, 2006;Peterson et al, 2010). Although some authors have already reported neuromotor dysfunctions in the ipsilesional limbs when compared to healthy controls (Hall et al, 2011;Lamontagne et al, 2002;Lamontagne et al, 2000;Milot et al, 2006), they explained the dysfunction as a compensatory strategy rather than as a consequence of the lesion (Higginson et al, 2006;Lamontagne et al, 2002;Lamontagne et al, 2000).…”

Section: -Introductionmentioning

confidence: 97%

“…Although some authors have already reported neuromotor dysfunctions in the ipsilesional limbs when compared to healthy controls (Hall et al, 2011;Lamontagne et al, 2002;Lamontagne et al, 2000;Milot et al, 2006), they explained the dysfunction as a compensatory strategy rather than as a consequence of the lesion (Higginson et al, 2006;Lamontagne et al, 2002;Lamontagne et al, 2000).…”

Section: -Introductionmentioning

confidence: 99%