Arm Motor Control as Predictor for Hypertonia After Stroke: A Prospective Cohort Study

Lex D. de Jong*, Maurits H. Hoonhorst, Ilse Stuive, Pieter U. Dijkstra

*Corresponding author for this work

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Abstract

de Jong LD, Hoonhorst MH, Stuive 1, Dijkstra PU. Arm motor control as predictor for hypertonia after stroke: a prospective cohort study. Arch Phys Med Rehabil 2011;92:1411-7.

Objectives: To analyze the development of hypertonia in the hemiparetic elbow flexors, and to explore the predictive value of arm motor control on hypertonia in a cohort of first-ever stroke survivors in the first 6 months poststroke.

Design: A prospective cohort study.

Setting: A cohort of stroke survivors from a large, university-affiliated hospital in The Netherlands.

Participants: Patients (N=50) with first-time ischemic strokes and initial arm paralysis who were admitted to a stroke unit.

Interventions: Not applicable.

Main Outcome Measures: At 48 hours, 10 to 12 days, 3 and 6 months poststroke, hypertonia and arm motor control were assessed using the Modified Ashworth Scale and the Fugl-Meyer Assessment arm score.

Results: The incidence rate of hypertonia reached its maximum before the third month poststroke (30%). Prevalence was 42% at 3 and 6 months. Participants with poor arm motor control at 48 hours poststroke were 13 times more likely to develop hypertonia in the first 6 months poststroke than those with moderate to good arm motor control. These results were not confounded by the amount of arm function training received.

Conclusions: Hypertonia develops in a large proportion of patients with stroke, predominantly within the first 3 months poststroke. Poor arm motor control is a risk factor for the development of hypertonia.

Original languageEnglish
Pages (from-to)1411-1417
Number of pages7
JournalArchives of Physical Medicine and Rehabilitation
Volume92
Issue number9
DOIs
Publication statusPublished - Sep-2011

Keywords

  • Epidemiology
  • Muscle hypertonia
  • Rehabilitation
  • Risk factors
  • Stroke
  • Upper extremity
  • MODIFIED ASHWORTH SCALE
  • TIME-COURSE
  • POSTSTROKE SPASTICITY
  • 1ST-EVER STROKE
  • POST-STROKE
  • UPPER-LIMB
  • RECOVERY
  • ASSOCIATION
  • RELIABILITY
  • PREVALENCE

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